GNU Wget, versions 1.25.0 and earlier, contains a server-side request forgery (SSRF) vulnerability in its implementation of FTP passive mode. Because Wget does not properly validate IP addresses obtained from PASV responses, an attacker-controlled FTP endpoint can redirect the client’s connection to arbitrary IPs, potentially exposing internal network host and service responses. This vulnerability has been remediated in a recent update by GNU; see the Solutions section below for resolution guidance.
Description
GNU Wget is a widely used command-line utility for retrieving content over HTTP, HTTPS, and FTP. When operating over FTP in passive mode, Wget relies on the server’s PASV response to determine which IP address and port to use for the data connection.
CVE-2026-15146 GNU Wget does not validate the IP address provided by an FTP PASV response while operating in FTP passive mode. A malicious FTP server, or an HTTP server that redirects to an FTP URL, can exploit this behavior to redirect Wget’s data connection to an arbitrary IP address and port. This allows an attacker to forge server-side requests (SSRF) from the machine running Wget, potentially accessing localhost services or internal network resources.
This issue belongs to a known class of FTP PASV vulnerabilities such as CVE-2021-40491, which was previously remediated in GNU Inetutils.
Impact
A remote attacker controlling or influencing an FTP endpoint can induce Wget to establish connections to otherwise inaccessible internal network addresses. This may allow the attacker to retrieve service banners, access internal HTTP endpoints, or exfiltrate data from internal systems reachable by the victim host. Applications that embed Wget for automated retrieval are particularly susceptible, because the vulnerability may be triggered automatically through redirected requests and untrusted user-supplied URLs.
Solution
GNU Wget has remediated this issue in the 07/05/2026 commit 4f85853f641863d5915786a8413e1a213726a62b. Users are advised to update their version according to vendor guidance.
Acknowledgements
Thanks to Jeremy Brown for researching and reporting this vulnerability. This document was written by Molly Jaconski.
Vendor Information
One or more vendors are listed for this advisory. Please reference the full report for more information.
PayRange is a mobile payment app that allows users to pay for vending machines, laundromats, and other unattended machines using a smartphone with Bluetooth. Two vulnerabilities were discovered in version 7.0.7 of the PayRange app that is available in the Google Play store.
Description
A vulnerability (CVE-2026-13462) exists in the PayRange Android app that causes invalid SSL certificates to be accepted in application WebViews. A second vulnerability (CVE-2026-13461) exists that allows the injection of JavaScript, which can be used to escape the WebView sandbox and perform a number of dangerous actions on the user's device. These vulnerabilities were discovered in version 7.0.7 of the PayRange app.
The PayRange app bypasses Android's SSL trust chain and accepts certificates that match any of the following rules (including self-signed certificates):
Common Name ends with "payrange.com"
Common Name contains "stripe.com"
Common Name contains "fetlifestatus.com" AND any of these conditions are true:
Issuer Common Name is "R10"
Issuer Common Name is "R3"
Issuer Common Name contains "Network Solutions"
The attack vector is an on-path interception. If an attacker can direct traffic intended for a legitimate server to a device they control, they can negotiate a TLS connection with the user's device using any trusted certificate that matches the rule set. They are then able to inject content into the WebView and harvest credentials, issue malicious requests and read data entered by the user, including exchanges with the PayRange and Stripe servers.
Impact
An attacker may be able to intercept any information they can convince the user to send through the app. If the user is a machine operator, the injected JavaScript code can also connect to PayRange hardware and issue commands with the full permissions of the operator.
Solution
Unfortunately, we were unable to reach the vendor to coordinate this vulnerability. Apply the latest software updates provided by your hardware or software vendor as they become available.
Acknowledgements
Thanks to Tahi Wilton Geary for reporting this vulnerability. This document was written by Bob Kemerer.
Vendor Information
One or more vendors are listed for this advisory. Please reference the full report for more information.
Two vulnerabilities have been discovered in Xerte Online Toolkits, an open-source e-learning authoring toolsuite intended for the creation of learning materials within a web browser. CVE-2026-14261 tracks the persistence of the /setup/ directory after installation, which allows an unauthenticated attacker to reconfigure the application to point to a remote database they control in order to gain administrative access. CVE-2026-12116 tracks an editable antivirus binary path that can be redirected to a PHP interpreter, causing uploaded files to be executed as PHP code and resulting in remote code execution (RCE). Version v3.15.5 or v3.14.6 of Xerte Online Toolkits fixes these vulnerabilities.
Description
Xerte Online Toolkits is a suite of a free, open-source e-learning authoring tools that allows users to make educational materials directly in-browser. The toolset is installed from multiple packages, and creates a setup folder that persists after installation.
CVE-2026-14261
A vulnerability in Xerte Online Toolkits allows for authentication bypass and remote code execution via reinstallation through the /setup/ folder, enabling attackers to reinstall the service to a remote database they control.
CVE-2026-12116
A vulnerability in Xerte Online Toolkits allows for RCE through the antivirus binary path in the tools server settings. The antivirus binary runs on all uploaded files, but the path to the binary can be modified using the configuration menu. An attacker can achieve remote code execution by redirecting the path to a PHP interpreter, causing any uploaded PHP scripts to be executed.
During installation, Xerte creates a /setup/ folder to configure database connection settings. This folder persists post-installation without access controls or automatic cleanup, and /setup/index.php does not verify whether installation has completed. An attacker can revisit /setup/ and reconfigure the application to point to a remote database, thereby gaining administrative access.
After gaining admin privileges, an attacker can abuse CVE-2026-12116 by editing the antivirus binary path to point to a PHP interpreter. This causes any new uploaded files to be passed to the PHP runtime through website_code/php/import/fileupload.php, bypassing file extension checks and resulting in remote code execution.
Impact
Successful exploitation can allow full remote code execution on the affected server. This enables attackers to establish persistent access, exfiltrate data, or launch supply chain attacks by injecting malicious content into educational materials distributed by the platform.
Solution
These issues have been addressed in two commits:
- 8fec660 removes /setup/ automatically after installation/upgrade and blocks reuse.
- 8ef2062 moves sensitive configuration files, including the antivirus binary path, to server-side locations.
Users should take the following steps immediately:
1. Manually remove the initial installation /setup/ folder from installations.
2. Upgrade to Xerte v3.15.5 or v3.14.6 and run upgrade.php, which enforces automatic /setup/ removal and includes security hardening. If removal fails, the updated code still prevents exploitation.
This blog post: https://www.xerte.org.uk/index.php/en/news/blog/80-news/364-xerte-3-14-and-3-15-important-security-update contains more information and contact data for Xerte.
Acknowledgements
Thanks to the reporter, George Filippov from the Vexel Foundation. This document was written by Christopher Cullen.
Vendor Information
One or more vendors are listed for this advisory. Please reference the full report for more information.
Adalo’s no‑code application platform exposes complete user records through its database API for all applications built on both V1 and V2. Due to a platform-level flaw, authenticated users can retrieve full user data belonging to any Adalo application, regardless of configuration. This issue affects more than one million applications and placing developers and their end users at risk of data exposure that they cannot prevent or remediate.
Description
Adalo is a Software-as-a-Service (SaaS) provider for building no-code applications. In theory, each application or tenant (customer) is logically isolated with separate databases, users, and configurations.
CVE-2026-10706 Unrestricted Disclosure of Full User Records
The Adalo database API contains a flaw which allows the backend to return complete user records for every list component request, regardless of which fields the component is configured to display. The database does not enforce ownership‑aware, server‑side authorization checks, allowing authenticated users of any Adalo application to query database and table identifiers belonging to other applications and retrieve full records, including fields not requested. This issue is amplified by the permissive CORS policy, plaintext storage of all text files and evidence suggests that deleted records may remain accessible.
CVE-2026-10708 Exposure and Reuse of Long-Lived JWT Tokens
The JWT tokens are visible in client‑side requests and remain valid for approximately twenty days. Once copied, they can be reused from any external website or script to query the database API directly. Because the platform allows requests from any origin, attackers can repeatedly query the API and extract large volumes of user data without interacting with the application itself. The combination of exposed tokens, permissive CORS behavior, and large response limits enables persistent, automated harvesting of entire user databases using only a single token obtained from any visitor session.
Impact
These vulnerabilities affect all Adalo applications across both V1 and V2. Because they occur at the platform level, the entire population of Adalo‑built applications is impacted.
Exposure of Sensitive Information to an Unauthorized attacker (CVE-2026-10706) Attackers may extract full user records and correlate user behavior across multiple applications via dbId enumeration. The platform does not implement data minimization, privacy by design, or implement appropriate technical safeguards, allowing sensitive information to be exposed to unauthorized parties.
Insufficiently Protected Credentials (CVE-2026-10708) This vulnerability enables large‑scale data harvesting without requiring app‑specific secrets. A single request to a minimal leaderboard component may return user records containing emails, UUIDs, and custom fields. The combination of wildcard CORS behavior, long‑lived twenty‑day JWTs, and the absence of token revocation allows attackers to gather sensitive personal information from any Adalo application.
Solution
Adalo contains an access control weakness that may allow unauthorized users to bypass application boundaries under certain conditions. Adalo has acknowledged the issue, however, no patch is currently available. Customers and tenants should assume data in Adalo collections may be exposed, and avoid storing sensitive information there until a patch is deployed. Users should remain aware of increased phishing and identity theft risks and monitor their accounts for suspicious activity.
Acknowledgements
Thanks to the reporter Saud Darwish. This document was written by Laurie Tyzenhaus.
Vendor Information
One or more vendors are listed for this advisory. Please reference the full report for more information.
Several versions of Tenda firmware contain an undocumented authentication backdoor that grants administrative access to the devices' web management interfaces. An attacker can expoit this vulnerability, tracked as CVE-2026-11405, to bypass the password verification process and obtain full administrative control without valid credentials.
Tenda is a supplier of home and business network devices such as routers, switches, wireless access points, and video surveillance equipment. Most of these devices include web-based interfaces that allow users to perform configuration and management operations, which are protected by username/password authentication to prevent unauthorized modifications.
The web server binary /bin/httpd contains an undocumented backdoor authentication mechanism in the login() function. Initially, the function follows a normal authentication path using MD5-based password verification. However, if authentication fails, the function invokes GetValue("sys.rzadmin.password") to retrieve an alternate password value from the device configuration. It then performs a direct strcmp() comparison in plaintext between the user-supplied password and the configuration-stored value. A successful match grants role=2 admin-level access and creates a valid session.
The associated username is not validated, so any provided username will succeed when paired with the backdoor password. This backdoor authentication mechanism is not documented or visible through any administrative interface.
Impact
Successful exploitation grants full administrative access to the device's web interface, regardless of the configured administrator account credentials. With administrative control, an attacker can reconfigure the device, alter network settings, and disable security features, enabling broader compromise of the local network.
Solution
Unfortunately, we were unable to reach the vendor to coordinate this vulnerability. Since a patch is unavailable, we can only offer mitigation strategies. The following workarounds can help mitigate this vulnerability's impact until a fixed version is released:
Disable remote management on your device
If your device supports remote web management, disable it. Disabling this feature prevents attackers on external networks from accessing your device’s administrative dashboard over the internet.
Restrict local network exposure
Changing the default LAN IP address may reduce opportunistic discovery by automated scanners that target known default IP ranges. Note that this measure does not prevent deliberate or targeted network scanning.
Acknowledgements
Thanks to the reporter who wishes to remain anonymous. This document was written by Bob Kemerer.
Vendor Information
One or more vendors are listed for this advisory. Please reference the full report for more information.
HP Printers in the Deskjet 2800 Series running firmware version <=TBP1CN2612AR contain a missing authorization vulnerability tracked as CVE-2026-13753. This vulnerability allows unauthenticated access to the printer's webserver API endpoints, exposing Wi-Fi credentials, management configuration details, and sensitive security data normally restricted to administrative users.
Description
Modern HP printers provide a web-based management interface for configuring content such as Wi-Fi Direct settings, SNMP management access, and device security options. When accessed normally through the browser interface, these pages explicitly require administrator credentials before sensitive information is displayed. This information is protected because, for example, Wi-Fi Direct controls the printer's direct wireless connectivity, and SNMP configuration settings can reveal detailed information about the device's monitoring and management controls.
In affected firmware versions, the authorization requirement can be bypassed by sending direct, unauthenticated GET requests to multiple backend API endpoints. The affected endpoints return administrative configuration data without validating session state or authentication, including the Wi-Fi Direct SSID and plaintext passphrase, unique printer serial numbers and service IDs, and details about the device's administrative password state. This information is freely disclosed even though the corresponding web interface pages correctly enforce authentication, indicating an authorization flaw in the API layer.
Impact
A remote attacker with network access to the printer can bypass the web interface's authentication requirements and retrieve sensitive configuration data directly from backend APIs. Exposed information includes Wi-Fi Direct credentials, SNMP configuration details, device identity information, cloud service registration metadata, and other information involving the device's administrative security state. An attacker could use this information to gain unauthorized wireless access, perform reconnaissance on network or cloud integrations, impersonate the device, or facilitate further compromise of the printing environment.
Solution
Unfortunately, we were unable to reach HP to coordinate this vulnerability, so a firmware patch is not yet available. To limit the risk of this vulnerability, users should restrict network access to the printer's web interface by placing the device on a trusted or isolated network segment, disable Wi‑Fi Direct if it is not required, and limit SNMP access to trusted systems or disable it entirely. Firewall or access-control list (ACL) rules should be used to prevent untrusted hosts from reaching the printer's management ports, and discovery or cloud service features that are not needed should be disabled.
Acknowledgements
Thanks to Nguyễn Tiến Dũng for researching and reporting this vulnerability. This document was written by Molly Jaconski.
Vendor Information
One or more vendors are listed for this advisory. Please reference the full report for more information.
The GamersFirst Anti-Cheat (GFAC) driver GFAC.sys contains multiple local privilege escalations and denial-of-service vulnerabilities stemming from insecure handling of user-controlled input through a minifilter communication port. A local attacker can abuse these flaws to perform arbitrary kernel memory writes, obtain privilege escalation to SYSTEM, or trigger a system crash.
Description
GFAC is a proprietary anti-cheat software developed by video game publisher Little Orbit. GFAC includes a kernel-mode driver, GFAC_Sys_x64.sys, that exposes privileged functionality to user-mode applications through a minifilter communication port. Although these low-level interfaces are necessary for the software's operation, vulnerabilities can arise if user-mode access is not properly restricted and validated.
CVE-2026-12166GFAC_Sys_x64.sys contains a NULL pointer dereference condition in its initialization and request handling logic. A local attacker can trigger the vulnerable code path, causing the driver to read or write to a memory address assigned as NULL. Successful exploitation results in a system crash (“blue screen of death”).
CVE-2026-12167 The minifilter communication port that GFAC_Sys_x64.sys exposes does not enforce sufficiently restrictive security descriptors. As a result, low-privileged users can establish connections to the driver and access functions intended only for trusted processes. [RM1.1][MB1.2][RM1.3]User access to privileged functions could help an attacker take advantage of other weaknesses in the driver.
CVE-2026-12168GFAC_Sys_x64.sys processes messages received through a minifilter communication port without properly validating user-supplied memory addresses before performing write operations. An attacker can provide a crafted request containing a desired destination address and data value, causing the driver to write arbitrary data to kernel memory. This write-what-where condition can be leveraged to modify sensitive operating system structures, such as process security tokens, resulting in privilege escalation to SYSTEM.
Impact
Multiple vulnerabilities in the driver may allow local attackers to crash the system, escalate privileges to SYSTEM, or execute unauthorized code. Due to insufficient access controls, privileged driver functionality is exposed to untrusted users, increasing the likelihood and impact of exploitation.
Solution
Unfortunately, we were unable to reach the vendor to coordinate this vulnerability. Users should restrict local access to trusted users and monitor systems for unauthorized interactions with GFAC. Where available, games that utilize GFAC should be disabled or removed until an update is available to address the identified vulnerabilities.
Acknowledgements
Thanks to Lucian Alexandru Necula for identifying and disclosing these vulnerabilities. This document was written by Michael Bragg.
Vendor Information
One or more vendors are listed for this advisory. Please reference the full report for more information.
Two vulnerabilities have been identified in FastStone Image Viewer 8.3 that may allow remote code execution or control-flow corruption when processing specially crafted image files. The affected components include the JPEG 2000 (JP2) parser and the PSD file parser. An attacker can exploit these vulnerabilities by causing the application to automatically or interactively process malicious image files.
Description
FastStone Image Viewer is a software tool for browsing, editing, and managing images, offering features like full‑screen viewing, batch processing, red‑eye removal, and a wide range of editing effects. It supports virtually all major image and RAW formats and includes conveniences like slideshows, comparison tools, scanner support, and screen capture.
CVE-2026-30040 A critical heap-based buffer overflow vulnerability exists in FastStone Image Viewer, versions 8.3 and earlier. The issue is triggered during the parsing of JPEG 2000 (JP2) files due to a malformed QCD (quantization default, 0xFF5C) marker in the FSViewer.exe process. By exploiting this flaw, a remote attacker can overwrite the EIP (instruction pointer) and execute arbitrary code in the context of the current process via a crafted JP2 file.
Notably, this issue does not require the victim to directly open the crafted JP2 file. When the application enumerates directories during automatic thumbnail generation, files within two directory levels are parsed by the JP2 decoder. If the malicious JP2 file is present within this enumeration range (for example in the user’s Downloads folder), the vulnerability is triggered automatically.
CVE-2026-30041 An integer overflow vulnerability exists in the PSD parser of FastStone Image Viewer, versions 8.3 and earlier. The vulnerability is caused by a lack of proper validation for the height value in PSD files, leading to a subsequent heap-based buffer overflow. Successful exploitation could allow a remote attacker to execute arbitrary code or cause a persistent denial-of-service (crash) via a crafted PSD file.
Impact
Successful exploitation of CVE-2026-30040 could allow arbitrary code execution in the context of the user running FastStone Image Viewer. Additionally, an attacker could exploit CVE-2026-30041 to overwrite the instruction pointer and control the program's execution flow, crashing the application or potentially enabling arbitrary code execution. The impact severity depends on the privileges of the user running the application. Code executed under elevated permissions would result in significantly higher risk.
Solution
Unfortunately, we were unable to reach the vendor for coordination, and a patch is not yet available. To limit the risk of this vulnerability, run the software using a restricted local account and enforce policies that prevent users from downloading or saving JP2 or PSD files from untrusted sources.
Acknowledgements
This vulnerability was disclosed by Sunghun Oh. This document was written by Bob Kemerer.
Vendor Information
One or more vendors are listed for this advisory. Please reference the full report for more information.
Microsoft Windows Recovery Environment (WinRE) provides a mechanism for recovering and repairing Windows systems using an alternate boot environment. Under certain platform implementations, access to WinRE may allow an attacker to bypass firmware security controls, including administrator-configured UEFI/BIOS passwords. An attacker with physical or administrative access to a device may be able to leverage WinRE-related boot mechanisms to circumvent firmware protections and gain unauthorized access to system resources.
Description
Microsoft Windows versions 10 and 11 include the WinRE capability, a recovery platform that supports features such as the F11 recovery menu and the Reset this PC functionalities. WinRE is commonly used for system recovery, troubleshooting, and remote support scenarios.
When WinRE is invoked, the system reboots into a recovery environment that may use an alternate boot path from the standard operating system startup sequence. Depending on the platform and firmware implementation, the alternate boot path may not consistently enforce the same UEFI/BIOS security controls that are applied during a normal boot process.
A security concern has been identified in certain WinRE implementations where administrative UEFI/BIOS passwords may not be enforced during specific recovery operations. This inconsistency in the boot execution path may allow an attacker with physical access to a device to bypass firmware-level protections. Such scenarios are commonly associated with "Evil Maid" attacks, in which an attacker gains temporary physical access to an unattended system and modifies its boot configuration or security settings.
In UEFI-based systems, the UEFI boot manager supports the BootNext variable, which specifies a one-time boot target stored in non-volatile memory (NVRAM). The UEFI trust model assumes that only privileged software or the platform owner can modify NVRAM variables; however, the BootNext variable itself is not authenticated and takes precedence over the normal BootOrder configuration during the next boot cycle. When Secure Boot is enabled, firmware validates the integrity and signature of the boot application specified by BootNext before execution. The UEFI specification does not explicitly mandate a full platform reset when the BootNext variable is configured, leaving reset-handling and user authentication flows to the specific implementation. Consequently, the effectiveness of pre-boot security controls (such as UEFI/BIOS password protections and BitLocker full-disk encryption) can be bypassed via recovery environments like WinRE, provided a user has the privileges required to initiate such recovery.
Organizations with high security requirements for their devices should not rely solely on UEFI/BIOS passwords to protect systems where WinRE or such recovery environments are accessible to untrusted users. Additional controls should be implemented to protect against both physical-access and privileged-user attacks.
Impact
An attacker with access to the Windows Recovery Environment may be able to bypass administrator-configured UEFI/BIOS password protections on affected systems. Depending on the device configuration and firmware implementation, an attacker may also be able to perform actions that weaken or circumvent BitLocker full-disk encryption protections, potentially resulting in unauthorized access to sensitive data.
Solution
Microsoft has published an advisory related to recovery-environment hardening and secure boot configurations, including mitigations for vulnerabilities affecting WinRE mechanisms. Organizations should review applicable vendor guidance and evaluate whether their systems are susceptible to WinRE-based firmware security bypasses.
In addition to standard recommendations (e.g., enabling Secure Boot), the following mitigations are advised for highly sensitive systems:
Disable or restrict WinRE on systems where recovery functionality is not operationally required.
Require administrative authorization with ephemeral one-time access before enabling or invoking recovery environments.
Enable BitLocker with TPM + PIN or TPM + Startup Key to ensure additional authentication is required during recovery and pre-boot scenarios.
Enable restrictions of pluggable media with EFI System Partitions (ESP) and any modifications to sensitive items in UEFI NVRAM such as BootNext and BootOrder.
Deploy endpoint detection and response (EDR) solutions or end-point restrictions that support pre-boot security along with remote attestation and measured boot technologies to detect or block unauthorized boot modifications.
Implement physical security controls, including device locks, secure storage, tamper-evident protections, and chain-of-custody procedures for high-value systems.
These recommendations should be evaluated in accordance with organizational recovery requirements and operational constraints. Some of the recommendations were adapted from Eclypsium research blog
Acknowledgements
Thanks to Beatriz Fresno Naumova for reporting this vulnerability. This document was written by Vijay Sarvepalli.
Vendor Information
One or more vendors are listed for this advisory. Please reference the full report for more information.
Multiple vendor-signed UEFI applications are vulnerable to Secure Boot bypass via a "Bring Your Own Vulnerable Driver" (BYOVD)-style attack. If a target system trusts the affected vendor’s certificate, an attacker can exploit these applications to execute arbitrary code during the early pre-boot phase before the operating system initializes. To mitigate this risk, system administrators should apply updates to the UEFI Forbidden Signature Database (DBX) that revoke trust in the affected vendor-signed binaries, preventing these vulnerable applications from executing during the boot process.
Description
The Unified Extensible Firmware Interface (UEFI) standard defines the modern firmware architecture used to initialize hardware and transfer control to the operating system during system startup. On systems with Secure Boot enabled, UEFI applications and drivers must be cryptographically signed and verified before execution. Trust for these signatures is established through several firmware-managed databases, including the authorized signature database (DB), which commonly contains certificates from original equipment manufacturer (OEM) vendors, operating system authorities, and other supply-chain partners in the UEFI ecosystem.
The UEFI shell is a command-line application that allows advanced users to interact directly with the UEFI environment to run diagnostics or special tasks prior to the operating system boot. Other UEFI applications, such as bootloaders, manage the operating system startup sequence or load specific drivers before the main OS initializes. Some of these applications possess functionalities that can manipulate system memory, modify sensitive NVRAM variables, or load raw drivers.
If a vendor-signed application inadvertently exposes these capabilities without strict access controls, attackers can abuse them to circumvent Secure Boot policies and execute unverified code. This exposure effectively results in an early compromise of the pre-boot environment, bypassing the Secure Boot policy.
Researchers from ESET identified multiple UEFI applications vulnerable to this type of abuse. To neutralize the risk, the affected binaries will be added to vendor-specific DBX revocation lists to prevent them from executing on the target systems.
Impacted UEFI Applications
[Vendor, Application and vulnerable function
Authenticode SHA hash
SHA256 file hash]
This vulnerability only impacts systems where the specific affected vendor's certificate is trusted within the UEFI Authorized Signature Database (DB). On such systems, an attacker with administrative privileges or physical access could leverage the vulnerable application to bypass Secure Boot protections and execute arbitrary code before the operating system loads.
Code executed during this early boot phase can achieve persistent platform compromise, including the ability to load unsigned or malicious kernel components that survive system reboots and operating system reinstallations. Because this activity occurs before the operating system and endpoint security products initialize, malicious code executed through this technique may completely evade detection by standard security controls and endpoint detection and response (EDR) solutions.
Solution
Apply the latest firmware and software updates provided by your hardware or software vendor. Please refer to the Vendor Information section for details. Updated software packages will replace vulnerable UEFI applications with corrected versions that incorporate the latest upstream security fixes.Additionally, administrators should update and verify the UEFI DBX on affected systems to ensure the vulnerable binaries are revoked and can no longer execute during the boot process.
Acknowledgements
Thanks to Martin Smolar of ESET for researching and reporting this vulnerability. This document was written by Vijay Sarvepalli.
Vendor Information
One or more vendors are listed for this advisory. Please reference the full report for more information.
The SignalRGB kernel driver, SignalIo.sys, contains two vulnerabilities involving improper access control and unsafe memory handling. The device object is created with an overly permissive Discretionary Access Control List (DACL) that allows user-mode processes to access privileged hardware operations through input/output control (IOCTL) commands. Additionally, several IOCTL handlers are susceptible to NULL pointer dereference conditions, which further enables low-privilege users to trigger kernel crashes and cause Denial of Service (DoS). Version 1.3.7.0 of the SignalRGB driver remediates these vulnerabilities.
Description
SignalRGB is a Windows application used for RGB lighting control and hardware monitoring. Its kernel component, SignalIo.sys, provides the low-level interfaces required to access and interact with hardware resources.
The SignalIo.sys driver exposes privileged functionality intended for administrative or security operations, but the device object is created without a restrictive security descriptor. Specifically, the driver does not apply security best practices by using either Security Descriptor Definition Language (SDDL) or the IoCreateDeviceSecure API, thereby allowing unprivileged user-mode processes to open handles to the device and issue privileged IOCTL requests.
CVE-2026-8049 The \\.\SignalIo device object is created without an explicit SDDL security descriptor and without FILE_DEVICE_SECURE_OPEN. This results in overly permissive default access control, allowing any authenticated local user to obtain a handle to the device and issue privileged IOCTLs.
CVE-2026-8050 Seven of the sixteen IOCTL handlers dereference the SystemBuffer pointer without first verifying that it is non-NULL. Sending an IOCTL with an empty input buffer causes a NULL pointer dereference, resulting in a kernel crash.
Impact
The device's insufficient access control enables user-mode interaction with privileged IOCTL interfaces and sensitive driver functionality, including read/write access to the PCI configuration space of system devices. Additionally, an authenticated local attacker can trigger repeated kernel crashes by accessing the \\.\SignalIo device and sending NULL input buffers to any of the seven vulnerable IOCTLs.
Notably, the affected SignalRGB drivers already include custom kernel-enforced port whitelists to block I/O access to several high-risk ports, which helps to limit the scope of sensitive operations available through the IOCTL interface.
Solution
SignalRGB has remediated these vulnerabilities in the recent 1.3.7.0 driver release. Users and organizations should update and/or block the previous vulnerable driver version where possible and implement mitigations designed to reduce exposure to BYOVD attacks, including restricting administrative privileges, enforcing Microsoft's recommended driver block rules, and enabling protections such as Windows Defender Application Control (WDAC) or an equivalent EDR solution for your environment.
Acknowledgements
Thanks to Shravan Kumar Sheri for researching and reporting this vulnerability, and to SignalRGB for their prompt engagement and remediation efforts. This document was written by Molly Jaconski.
Vendor Information
One or more vendors are listed for this advisory. Please reference the full report for more information.
A vulnerability has been discovered in the Haskell TLS software stack, commonly used by applications built in the Haskell programming language to securely connect to servers over the internet. Specifically, the libraries "crypton-x509-validation" fail to enforce a key security feature called NameConstraints, a standard defined in RFC 5280 that helps organizations control which domains a certificate authority (CA) is allowed to issue certificates for. This vulnerability allows an attacker with access to the sub-CA to create certificates that will validate successfully with any Haskell TLS connection, allowing the attacker access to full session visibility. Version 1.91 for crypton-x509-validation have been released to address the vulnerability, tracked as CVE-2026-9648.
Description
Haskell is a programming language often used in enterprise, academic, and financial systems such as banks, insurance companies, and data processing platforms, which use it for backend services like fraud detection, risk modeling, and other sensitive connections. The Haskell TLS software stack is the implementation used by Haskell applications to establish secure HTTPS or TLS connections to servers, just like OpenSSL or Go’s TLS libraries do in other ecosystems. A vulnerability has been discovered within the stack; crypton-x509-validation, which do not enforce the NameContstraints security feature that other libraries, such as OpenSSL or Go, do.
The description for CVE-2026-9648 is as follows:
The crypton-x509-validation Haskell library fails to enforce X.509 NameConstraints, allowing TLS clients to accept certificates whose Subject Alternative Names fall outside the issuing CA’s permitted subtrees. This oversight enables an attacker who compromises a name-constrained sub-CA to impersonate domains beyond its intended scope.
NameConstraints are a security mechanism in digital certificates that tell a CA exactly which domains it’s allowed to issue certificates for. The crypton-x509-validation, which handle certificate validation in Haskell’s TLS connections, ignore these constraints entirely, so they never check whether a certificate’s Subject Alternative Name (SAN) falls within what the issuing CA is permitted to cover.
This enables a threat actor who gains access to a sub-CA key to create a certificate that includes a SAN for a protected domain, tricking Haskell clients into accepting it and enabling full impersonation of those services. Practically, a TA could set up a web server presenting the malicious CA, tracking any Haskell client to connect to the malicious web server, allowing them to capture any credentials or sensitive data transferred during the process.
Impact
An attacker that successfully exploits CVE-2026-9648 can capture any traffic sent between a Haskell client to their server, potentially giving access to sensitive financial information, credential theft, and secret theft.
This vulnerability is likely to affect industries that use delegated PKI structures, or structures that allow delegated systems to create and assign their own CAs. This is typical in banks or other financial industries.
Solution
The vulnerability requires considerable setup and victim interaction in order to be successful, but vulnerable parties should update their libraries to version 1.9.1 of the crypton-x509-validation libraries as soon as possible, as all version prior are vulnerable.
Acknowledgements
Thanks to the reporter, Ben Smyth.This document was written by Christopher Cullen.
Vendor Information
One or more vendors are listed for this advisory. Please reference the full report for more information.
Microsoft-signed UEFI bootloaders of the open-source shim project, primarily from version 0.9 and earlier, were identified as vulnerable to Secure Boot bypass. To mitigate this risk, the affected bootloaders will be added to the Microsoft UEFI Forbidden Signature Database (DBX). Once the DBX update is applied, these bootloaders will no longer be trusted for execution during the boot process.
An attacker could exploit these vulnerable shim bootloaders using a Bring Your Own Vulnerable Driver (BYOVD)-style technique to execute arbitrary code during the early boot phase, prior to operating system initialization, thereby bypassing Secure Boot protections.
Description
The Unified Extensible Firmware Interface (UEFI) standard defines the modern firmware architecture used to initialize hardware and transfer control to the operating system during system startup. On systems with Secure Boot enabled, UEFI applications and drivers must be cryptographically signed and verified before execution. Trust for these signatures is established through several firmware-managed databases, including the authorized signature database (DB), which commonly contains the "Microsoft Corporation UEFI CA 2011" certificate. This Microsoft certificate is widely used to sign third-party boot components intended to run under Secure Boot.
The open-source UEFI shim project is a small, signed bootloader that Microsoft signed using the "Microsoft Corporation UEFI CA 2011" certificate. Shim acts as a bridge between the motherboard's UEFI firmware and the operating system (typically a Linux distribution). Its purpose is to allow Linux distributions to boot with Secure Boot enabled without requiring every individual distribution's key to be built into the motherboard's NVRAM settings. In doing so, shim allows Linux distributions and other third parties to establish their own trust model through the use of Machine Owner Keys (MOKs), enabling additional bootloaders, kernels, and related components to execute within the Secure Boot chain. The shim project also introduced Secure Boot Advanced Targeting (SBAT), which provides a version-based revocation mechanism for boot components and simplifies future security updates and revocations.
Over time, multiple security vulnerabilities were identified and corrected in the upstream shim project. However, a number of vendors had previously forked or customized older versions of shim for their own products and boot environments. In many cases, these vendor-specific bootloaders were not updated after vulnerabilities in the upstream project became publicly known. As a result, vulnerable bootloaders remained signed and trusted by Secure Boot systems because they had not been revoked through the Microsoft-signed DBX revocation list. This created a long-term supply chain exposure in which outdated and vulnerable boot components could still be executed on fully patched systems.
Researchers from ESET identified multiple vulnerable shim bootloaders affected by these issues. The affected bootloaders will be added to Microsoft's official DBX revocation list as part of this coordinated disclosure.
Impacted shim bootloaders
[Vendor and Product Information
Authenticode SHA hash
SHA256 file hash
CVE ID]
RedHat RedHat Enterprise Linux (7.2) from UEFI shim loader(0.9)
7B2A3F5C96F95BD8086CE54B0825E300F9C8F11FE3401BB631B3215C8DE9EB10
3F24DD838C5C9E35B104FA2F3B74AC6A5BF92FD2
CVE-2026-10797
RedHat CentOS (7.2) from UEFI shim loader(0.9)
EB86FA1386FE6E4533B8B938DCC1250616D2F1C14C15E2FCF80834A161018A0A
E133BE08E8AD17AC00E3C8ED215499C5F3C54E64
CVE-2026-10797
baramundi software baramundi Management Suite (up to 2024R1) from UEFI shim loader(0.8)
FD23D6E57DE6F4E1F9D7118DA1C5F31A8AF6BE5E5D9E8170F9493447268D50C5
8637D7EFA23A8A5738F2E4AACB6C9919B405AA2C
CVE-2026-8863
WhiteCanyon/Blancco WipeDrive (versions 8.0.0 through 8.1.3.) from UEFI shim loader(0.7)
a0de9333442c1bf9349a460141ae5e80f911955c6506040fa3d021bf6c1ae3e4
8A402AFCD3C23D9253BBEA08576113C63E448AD0
CVE-2026-8863
NTC IT ROSA, LLC ROSA Linux (R10, R9) from UEFI shim loader(0.9)
236A9CB0D71951C36398A32EB660CE2CD4A52CCFA7CF751CC6A35D9DE549E19B
8F9E8DB8E2C2157C2A591F2BE070FF96BFE318C7
CVE-2026-8863
Oracle America, Inc. OracleLinux (7.2) from UEFI shim loader(0.9)
5E594C448760A3135B1A3A83E07A4F2E6FBE49414EF2C7CAB1CBA77F284FA63B
A16136899A12AD214FA4FBA60072BA72FBAB8BCA
CVE-2026-8863
PC-Doctor, Inc. PC Doctor Service Center (15, 16) from UEFI shim loader(0.9)
8A964D5F8373948D20A1D4296FB92E545DAD4617A0C810F3B934B53D98AE8963
BC01320D8FF8343B348EF8F3C947A66EB8FD9CE2
CVE-2026-8863
OpenSuse OpenSuse Shim (2.1) from UEFI Shim loader (0.9)
96275DFD6282A522B011177EE049296952AC794832091F937FBBF92869028629
6DB5266E80C9D51CDD54421E736DF2E6E6879A56
CVE not provided
Impact
An attacker with administrative privileges or the ability to modify the boot process could use one of the vulnerable shim bootloaders to bypass Secure Boot protections and execute arbitrary code before the operating system loads. Code executed during this early boot phase may achieve persistent compromise of the platform, including the ability to load unsigned or malicious kernel components that can survive system reboots and, in some cases, operating system reinstallation. Because this activity occurs before the operating system and many security products initialize, malicious code executed through this technique may evade detection by operating system security controls and Endpoint Detection and Response (EDR) solutions.
Solution
Apply a Patch
Apply the latest software updates along with latest bootloader updates as provided by your hardware or software vendor. See the Vendor Information section for details. Updated software should replace any vulnerable shim bootloaders with versions that incorporate the latest upstream security fixes and SBAT protections. Additionally, Microsoft DBX updates should be applied to all UEFI-based systems to ensure that vulnerable bootloaders can no longer be executed during the Secure Boot process.
Recommendations for Enterprises and Developers
Because modifications to the DBX (Forbidden Signature Database) can affect system boot behavior, vendors and administrators should thoroughly test these updates before broad deployment to ensure systems remain bootable. When deploying Secure Boot updates, it is recommended the latest authorized signature database (DB) is updated before applying DBX revocations. In practice, this means updating trusted boot applications and certificates first, followed by deployment of the revocation list. Failure to follow this order may cause systems to reject newly updated boot components. Enterprises, virtualization providers, and cloud operators managing large-scale deployments should prioritize validation and deployment of these updates to prevent the execution of vulnerable or unsigned binaries during physical or virtual machine startup. Microsoft also provides DBX update files and related tooling through the following repository: SecureBoot Objects
Audit tools such as Check-UEFISecureBootVariables for Windows systems using PowerShell, and uefi-dbx-audit for Linux systems, can be used to help verify that current DBX updates have been applied to UEFI-based laptops, desktops, servers, and virtual machines with Secure Boot enabled. These tools can also assist enterprise administrators in identifying revoked or vulnerable boot components present on a system. Audit and verification capabilities may vary depending on platform firmware implementation and support for revocation mechanisms such as SBAT and the newer Microsoft-specific Secure Version Numbering (SVN) enforcement.
Acknowledgements
Thanks to Martin Smolar of ESET for researching and reporting this vulnerability. This document was written by Vijay Sarvepalli.
Vendor Information
One or more vendors are listed for this advisory. Please reference the full report for more information.
Version 3.0.7 of the Securly Chrome Extension contains multiple vulnerabilities involving insecure data transmission, weak cryptography, and improper access control. These issues may expose sensitive filtering rules, enable the manipulation of downloaded configuration files, and allow unauthenticated access to protected resources. An attacker could exploit these weakness to steal configuration information, induce a Denial of Service (DoS), or modify content blocking rules for student users.
Description
The Securly Chrome Extension is a browser add-on commonly used in K–12 school-managed Chromebooks to enforce internet safety policies, filter or block websites, and provide activity monitoring for students. It is an element of the Securly classroom management platform, which helps schools comply with web filtering requirements and safely manage student online access.
CVE-2026-8874
Version 3.0.7 of the Securly Chrome Extension downloads JSON files containing crisis alert keywords and filtering rules over unencrypted HTTP via the Fetch API. Other endpoints in the same extension correctly fetch Internet Watch Foundation (IWF) and Children's Internet Protection Act (CIPA) data over HTTPS, demonstrating an inconsistent implementation of TLS.
CVE-2026-8876
The Securly Chrome Extension contains hardcoded, plaintext AES passphrases in securly.min.js. These keys decrypt crisis alert keyword data and intervention site data.
CVE-2026-8878
The Securly Chrome Extension exposes multiple publicly accessible endpoints that allow unauthenticated access to sensitive data. The exposed information consists of SHA-1 hashes that are inadequately obfuscated using a simple Caesar cipher, which can be easily reversed to recover the original hash values and access the protected data.
CVE-2026-8879
The Securly Chrome Extension dynamically registers content13.min.js as a content script via chrome.scripting.registerContentScripts() at runtime. This script is NOT declared in manifest.json and bypasses Chrome Web Store static security review. It runs on all URLs and immediately hides all page content, creates a full-page overlay, pauses all videos, and only restores content when the service worker confirms the page passes filtering. If Securly's servers are unreachable, pages remain indefinitely hidden.
CVE-2026-8881
The Securly Chrome Extension uses EVP_BytesToKey key derivation with MD5 and a single iteration for AES encryption. MD5 has been broken since 2004 and a single iteration provides no key stretching. This weak derivation method significantly reduces the effective security of the encryption, making the protected data vulnerable to efficient offline cracking.
CVE-2026-8888
The Securly Chrome Extension downloads config.json over HTTP and compiles server-provided patterns as JavaScript regular expressions via new RegExp() without complexity validation. An on-path attacker can inject specific patterns to cause catastrophic backtracking, resulting in denial of service on all browsing.
CVE-2026-8889
The Securly Chrome Extension uses deprecated SHA-1 hashing for IWF CSAM URL matching (25,020 hashes) and CIPA blocklist matching (12,352 hashes).
Impact
These vulnerabilities collectively enable multiple attack paths and threaten the security and privacy of student users, for which the extension may be academically mandatory. The HTTP configuration downloads (CVE‑2026‑8874, CVE‑2026‑8888) and weak cryptographic primitives (CVE‑2026‑8876, CVE‑2026‑8881, CVE‑2026‑8889) allow a network‑adjacent attacker to intercept, modify, or decrypt data related to keyword filtering. The presence of unauthenticated, publicly accessible endpoints with trivially reversible obfuscation (CVE‑2026‑8878) further exposes internal keyword lists, blocklists, and rule definitions. These weaknesses enable the reconstruction and manipulation of the extension’s filtering logic. For student users, this could result in exposure to content that the filtering system is intended to block, or the inappropriate blocking of legitimate educational resources. Additionally, the undeclared, dynamically‑registered content script (CVE‑2026‑8879) can be abused to fully obscure web pages, leading to DoS conditions for end users.
Solution
Unfortunately, Securly could not be reached for coordination of these vulnerabilities. Until a patch is available, administrators can lower their potential exposure by restricting usage of the extension on untrusted or public networks, installing school-managed VPNs on the underlying devices, and monitoring for unexpected or abnormal filtering behavior.
Acknowledgements
Thanks to the reporter Santh for discovering and researching these vulnerabilities. This document was written by Molly Jaconski.
Vendor Information
One or more vendors are listed for this advisory. Please reference the full report for more information.
VoLTE deployments on Verizon’s IMS network have operated without negotiated SIP integrity protection. In observed test conditions, SIP signaling—including registration, call setup, and messaging—traveled without IPsec ESP encapsulation and without SIP Security Agreement headers, exposing it to interception and modification by on-path attackers.
Recent carrier configuration updates, including Apple’s iOS 26.5 carrier bundle released on May 11, 2026, include IMS IPsec–related settings. However, such configuration entries do not confirm active deployment, successful negotiation, or functional protection in production.
Description
CVE-2026-10629
Verizon IMS deployments were observed transmitting SIP signaling without integrity protection. REGISTER exchanges lacked Security-Client, Security-Server, and Security-Verify headers, and no ESP-encapsulated SIP traffic was detected during subsequent signaling such as INVITE, MESSAGE, BYE, and UPDATE. This pattern persisted across devices, operating systems, and network conditions, indicating a deliberate network configuration rather than a transient issue.
Per 3GPP TS 33.203 and GSMA IR.92, SIP signaling between the UE and P-CSCF must be protected using IPsec ESP following IMS AKA authentication, with negotiation occurring during registration. The absence of this protection allows attackers to manipulate SIP signaling undetected, enabling call hijacking, spoofing, denial-of-service, and misrouting of emergency calls.
Verizon initially acknowledged the issue and stated that integrity support would be available upon request and extended broadly later in the year. However, the company has since ceased participation in coordination, including follow-up discussions and draft review, and has not provided verifiable evidence of mitigation. As remediation remains unconfirmed, this disclosure proceeds to inform users of an ongoing security exposure.
Independent verification would require observation of successful SIP security negotiation, ESP-protected traffic, or official confirmation from Verizon.
Impact
Without integrity protection, on-path attackers can intercept, replay, or alter SIP messages with no risk of detection. This undermines core VoLTE security assumptions and enables signaling spoofing, call disruption, and manipulation of emergency routing.
Although recent configuration changes suggest potential progress, their operational status remains unverified. Until protections are confirmed, the risk persists.
Solution
Remediation requires coordinated network and device-side changes. Verizon must enable and enforce SIP security negotiation and ESP protection in its IMS core infrastructure, and devices must receive and apply correct carrier configuration to support IPsec.
Verification should confirm successful SIP security negotiation and ESP-protected signaling, either through observed headers, traffic capture, or operator confirmation.
Until then, organizations relying on high-assurance VoLTE should treat signaling as untrusted
Acknowledgements
The authors thank DongWon Lee, Jeongmin Choi, and CheolJun Park from Kyung Hee University for their technical analysis, coordination efforts, and identification of the iOS 26.5 configuration updates. Their work has advanced understanding of this issue and ensured disclosures remain grounded in observable evidence.
This report was prepared by Timur Snoke, with AI-assisted drafting to support clarity and accuracy.
Vendor Information
One or more vendors are listed for this advisory. Please reference the full report for more information.
A stored cross-site scripting (XSS) vulnerability has been discovered in Appsmith, specifically in the CodeMirror based SQL query editor’s autocomplete renderer. CVE-2026-7299 has been assigned to track the vulnerability. An attacker with developer level access to a shared PostgreSQL datasource can inject arbitrary JavaScript by creating malicious database objects whose names contain XSS payloads. Successful exploitation leads to arbitrary JavaScript execution in the browser of any workspace member who triggers SQL autocomplete, enabling session hijacking, privilege escalation, or credential theft. Version 2.1 of Appsmith fixes CVE-2026-7299.
Description
Appsmith is an open source, low code platform intended to allow developers to build internal tools, dashboards, and applications using a UI builder, database and API integrations, and JavaScript customization. Appsmith can also be deployable either self-hosted or via the cloud. A vulnerability, tracked as CVE-2026-7299, has been discovered, allowing for XSS within the SQL query editors autocomplete function.
The vulnerability description is below.
CVE-2026-7299
Appsmith’s SQL query editor’s autocomplete functionality fails to sanitize database object names before rendering them in innerHTML, allowing an authenticated Developer to inject persistent XSS by a malicious table or column names triggering arbitrary code execution in the sessions of other workspace members when they interact with the same datasource.
This vulnerability requires an account with developer access. A developer Appsmith account is an account designed to create, edit, and delete apps within a workspace they are assigned to. When an administrator opens the SQL editor and triggers autocomplete (e.g., by typing SELECT * FROM), the malicious table name executes their stored payload, which can allow for privesc.
Impact
Successful exploitation of CVE-2026-7299 leads to arbitrary code execution in the browser of any workspace member who triggers SQL autocomplete, enabling session hijacking, privilege escalation, or credential theft.
Solution
Version 2.1 of Appsmith fixes this vulnerability. Users should update their installations as soon as possible.
Acknowledgements
Thanks to the reporter, Stuart Beck. This document was written by Christopher Cullen.vrf26-04-DQBSN_exploit.py
Vendor Information
One or more vendors are listed for this advisory. Please reference the full report for more information.
The Collibra Platform Agent contains vulnerabilities that can be chained by a remote, unauthenticated attacker to achieve remote code execution. An attacker can exploit these issues by uploading a crafted ZIP archive that writes attacker-controlled files to arbitrary locations on the server once extracted, resulting in code execution.
Description
Collibra Platform (CP) and Collibra Platform Self-Hosted (CPSH), an enterprise grade, cloud-based platform designed to help organizations locate, understand, trust, and manage their data assets. The Collibra Agent of CP and CPSH that is installed on the host system is an independent service that listens on different port than the web interface and have the following vulnerabilities.
CVE-2026-10622 Privileged REST endpoints exposed under /rest/* do not properly enforce authentication or authorization. This allows a remote, unauthenticated attacker to interact with sensitive application functionality and gather information useful for further exploitation, including identifying suitable filesystem locations or application paths.
Additionally, the web services hosting the vulnerable REST endpoint was observed to bind to all available network interfaces regardless of the setting passed to the installer script. This behavior may increase exposure in deployments where administrators believe access is restricted to specific interfaces or trusted networks.
CVE-2026-10621 A Zip Slip vulnerability during extraction is exposed through POST/rest/restore and enables path traversal. When a ZIP archive is processed, file paths contained within the archive are not properly validated or canonicalized before extraction.
A remote attacker can supply a crafted ZIP archive containing directory traversal sequences, such as ../, to write files outside of the intended extraction directory. This may allow attackers to write custom files to arbitrary locations on the underlying host.
In an observed exploitation path, this arbitrary file write can be used to place a malicious JSP file into a web-accessible directory, enabling remote code execution when the file is subsequently requested over HTTP.
Impact
A remote, unauthenticated attacker can chain these vulnerabilities to achieve remote code execution on the affected system. An attacker who successfully exploits these issues may be able to:
- install a persistent web shell
- read, modify, or delete application data
- disrupt system availability
- potentially pivot further into surrounding environment
Because exploitation does not require authentication, deployments reachable across public internet may be at significant risk.
Solution
Collibra has released the following versions to address these vulnerabilities.
Users are strongly encouraged to update to the fixed release as soon as possible. Refer to Collibra documentation and release notes for patching and deployment guidance.
Administrators should ensure that interfaces exposing REST endpoints are not exposed to untrusted networks and should restrict access to management interfaces wherever possible.
Acknowledgements
Thanks to the reporter who wishes to remain anonymous. This document was written by Michael Bragg.
VU#873170.2
Path traversal in restore handler in Collibra Agent, allows an attacker to write arbitrary files via a crafted ZIP archive. Collibra Agent fails to properly validate and canonicalize file path during ZIP extraction, this can allow an attacker to write files outside the intended extraction directory.
VU#873170.1
Improper Authentication in REST API in Collibra Agent, allows a remote unauthenticated attacker to access privileged functionality via exposed /rest/* endpoints.
Vendor Information
One or more vendors are listed for this advisory. Please reference the full report for more information.
The PCTCore64.sys Windows kernel driver from PC Tools Internet Security exposes its \\.\PCTCoreDriver device interface with no access control, allowing any user-mode process to interact with the driver and invoke privileged IOCTL (I/O Control) commands. In a Bring Your Own Vulnerable Driver (BYOVD) scenario, a local attacker with the ability to load a Windows driver can exploit the exposed interface to perform sensitive low-level operations on the target device.
Description
PCTCore64.sys is a Windows kernel driver that implements system monitoring and protection functionality on local Windows systems. The driver creates a Windows Driver Model (WDM) device object \\.\PCTCoreDriver via IoCreateDevice and provides user-mode access through a DOS device symbolic link via IoCreateSymbolicLink.
The driver exposes privileged functionality intended for administrative or security operations; however, the device object is created without a restrictive security descriptor. Specifically, the driver does not apply security best practices using either Security Descriptor Definition Language (SDDL) or the IoCreateDeviceSecure API, allowing unprivileged user-mode processes to open handles to the device and issue privileged IOCTL requests.
As a result, an attacker may invoke IOCTL handlers capable of performing sensitive low-level operations, including:
System-wide handle enumeration
Cross-process handle manipulation
Credential extraction from lsass.exe
Forced termination of arbitrary processes, including Protected Process Light (PPL)-protected processes
Although the original PC Tools Internet Security product line was discontinued in 2013 and is no longer maintained, the driver remains signed and can still be abused in BYOVD attacks. An attacker may load the vulnerable driver on a target system and leverage the exposed IOCTL interface to access privileged kernel functionality.
One vulnerable IOCTL permits the acquisition of a PROCESS_ALL_ACCESS handle to sensitive processes such as lsass.exe, enabling credential theft operations including extraction of NTLM hashes and Kerberos authentication material. Additional IOCTL handlers permit the termination of arbitrary processes regardless of PPL protections, enabling attackers to disable security software such as Microsoft Defender and other critical system services. Other exposed interfaces enable arbitrary handle operations against external processes, potentially resulting in process instability, crashes, or undefined behavior. Collectively, these vulnerabilities can be exploited to provide a practical attack path for credential theft, defense evasion, privilege escalation, and broader system compromise.
CVE-2026-8501 Improper access control in the PCTCore64.sys Windows kernel driver from PC Tools Internet Security allows user-mode processes to access the PCTCoreDriver WDM device interface and invoke privileged IOCTL handlers. A local attacker with the ability to access or load the affected driver can exploit this vulnerability to perform sensitive and privileged operations on the target system.
Impact
A local attacker with the ability to load a Windows kernel driver may exploit the vulnerable PCTCore64.sys driver to access sensitive processes such as lsass.exe and other PPL-protected services. Successful exploitation can enable credential theft, arbitrary process termination, denial-of-service (DoS) conditions, and broader system compromise through privileged kernel-level operations.
Solution
The PC Tools Internet Security product line and its PCTCore64.sys driver are no longer actively maintained and should not be used in production environments. Organizations should remove and block the vulnerable driver where possible and implement mitigations designed to reduce exposure to BYOVD attacks, including restricting administrative privileges, enforcing Microsoft recommended driver block rules, and enabling protections such as Hypervisor-Protected Code Integrity (HVCI), Windows Defender Application Control (WDAC), and Credential Guard.
Acknowledgements
Thanks to Tzachi Hazan for researching and reporting this vulnerability. This document was written by Molly Jaconski.
Vendor Information
One or more vendors are listed for this advisory. Please reference the full report for more information.
Casdoor versions 2.362.0 and earlier contain several identity and access management vulnerabilities that enable broad authentication bypass and privilege escalation. These flaws relate to Casdoor’s Security Assertion Markup Language (SAML) processing, account binding, and token exchange mechanisms. An attacker able to interact with Casdoor’s authentication interface may impersonate users, bypass multifactor authentication (MFA), forge and replay assertions, and achieve persistent unauthorized access.
Description
Casdoor is an open-source identity and access management (IAM) platform and Model Context Protocol (MCP) gateway that provides authentication, single sign-on, and multi-protocol identity services. It is designed to centralize and streamline access control, allowing organizations to manage user identities and permissions across multiple applications and environments.
CVE-2026-9090
Casdoor versions 2.362.0 and earlier contain a vulnerability that allows an attacker to bypass authentication by supplying an arbitrary signing certificate. The buildSpCertificateStore function extracts the X.509 certificate directly from the incoming SAMLResponse instead of using the trusted pre-configured Identity Provider certificate, allowing an attacker to forge assertions signed with an attacker-controlled key.
CVE-2026-9091
A logic flaw in Casdoor's social‑login binding flow allows users to bypass configured MFA requirements. The binding‑rule code path in controllers/auth.go calls HandleLoggedIn directly without invoking checkMfaEnable. Any user authenticating via this path is logged in without MFA enforcement.
CVE-2026-9092
Casdoor contains a vulnerability involving unverified email binding that may enable account takeover. The getExistUserByBindingRule function matches users by email address without checking the email_verified claim returned from upstream providers, and the idp.UserInfo struct does not include a EmailVerified field. Therefore, an attacker can supply an unverified email claim from an upstream provider to take over accounts that use the same email address.
CVE-2026-9093
Casdoor's SAML service provider implementation does not validate the AudienceRestriction element in SAML assertions. Casdoor never sets the AudienceURI field to specify which service provider the assertion is intended for, and does not check for audience mismatch warnings alerted by WarningInfo.NotInAudience. As a result, Casdoor may improperly accept assertions that were issued for a different service provider.
CVE-2026-9094
Casdoor contains a vulnerability that enables cross-organization token exchange. The GetTokenExchangeToken function in object/token_oauth.go validates JWT signatures but does not verify that the token's user belongs to the same organization as the target application. This can result in privilege escalation across organizational boundaries.
CVE-2026-9095
Casdoor maps SAML assertions to user sessions without replay protection. The ParseSamlResponse() function in object/saml_sp.go calls sp.RetrieveAssertionInfo() and immediately maps the result to a user session. There is no assertion ID cache, OneTimeUse condition enforcement, or replay detection anywhere in the SAML SP code path. As a result, an attacker can replay a previously captured SAML assertion to obtain an authenticated session for the assertion’s subject, including administrator accounts, without needing the user’s password or MFA credentials.
CVE-2026-9096
Casdoor does not enforce SAML assertion time bounds. The gosaml2 library reports all time-validation results, including NotOnOrAfter and NotBefore, in the assertionInfo.WarningInfo field. However, ParseSamlResponse() never reads this field, meaning that time bounds are computed by the library but silently discarded before the user session is issued.
CVE-2026-9097
Casdoor does not verify that a JWT used for token exchange is still active. The GetTokenExchangeToken() function in object/token_oauth.go validates the JWT signature and parses its claims, but never queries the Token table to verify whether the subject token has been revoked or invalidated. Because the revocation check is entirely absent, administrators are unable to terminate active sessions or revoke compromised tokens.
CVE-2026-9098
The SAML callback handler in controllers/auth.go accepts any well-formed SAMLResponse sent to /api/acs without verifying that it corresponds to an AuthnRequest previously issued by Casdoor. Additionally, if an administrator disables or deletes an identity provider (IdP) after a SAML flow has started, the handler still processes the response using the provider snapshot loaded at the start of the request. As a result, an attacker controlling a registered upstream IdP can send unsolicited SAML responses, or replay a legitimately captured response in a different session or after the original flow has ended. In both cases, Casdoor accepts the response and issues a session, enabling persistent unauthorized access.
Impact
Exploitation of these vulnerabilities can allow attackers to impersonate users, bypass authentication controls, and escalate privileges across Casdoor deployments.
CVE‑2026‑9090, CVE‑2026‑9093, CVE‑2026‑9095, CVE‑2026‑9096, CVE‑2026‑9098:
Multiple flaws in SAML processing allow assertion forgery or replay, misuse of assertions across sessions, and the processing of expired or unsolicited SAML responses. Because certificate trust is not enforced, time bounds and audience restrictions are ignored, and responses are not correlated to prior AuthnRequests, attackers can submit malicious or previously-captured assertions to obtain authenticated sessions for arbitrary users, including administrators.
CVE‑2026‑9091, CVE‑2026‑9092:
Weaknesses in MFA protection and binding logic further contribute to the risk of account compromise, enabling attackers to bypass MFA and potentially take over other accounts via unverified email claims. An attacker can exploit these flaws to gain persistent unauthorized access by bypassing configured authentication requirements or security controls.
CVE‑2026‑9094, CVE‑2026‑9097:
The discovered token-exchange flaws enable cross‑organization privilege escalation and prevent administrators from reliably revoking tokens. Because user‑organization membership is not validated and token revocation status is not checked, compromised or malicious tokens may be exchanged for elevated privileges in other organizations, and administrators cannot reliably terminate active sessions.
Solution
Unfortunately, we were unable to reach the Casdoor team to coordinate this vulnerability, and a patch is not yet available. Users are advised to implement stricter identity governance controls and utilize external validation tools to better enforce application boundaries. Restrict identity provider (IdP) usage only to trusted providers, reinforce high-privilege accounts with additional authentication paths such as downstream MFA, and monitor logs for any unusual SAML or token activity to reduce the exploitability of these issues.
Acknowledgements
We extend our thanks to Zixu (Jason) Zhou (University of Toronto, PhD student), David Lie (University of Toronto, Professor), Ilya Grishchenko (University of Toronto, Postdoc), and Xiangyu Guo (University of Toronto, PhD student) for researching and reporting these vulnerabilities. This document was written by Molly Jaconski.
Vendor Information
One or more vendors are listed for this advisory. Please reference the full report for more information.
Imagine handing your smartphone over for repair. A couple of days later, you pick it up — and great, it’s working again! But you won’t even realize that your device has been injected with malicious code, allowing attackers to access your smartphone even when it’s locked.
This is the beginning of the story shared by Kaspersky ICS CERT researchers, Alexander Kozlov and Sergey Anufrienko, at the Black Hat Asia 2026 conference. They managed to uncover a vulnerability that flips conventional assumptions about smartphone and IoT security on their head. Its core lies at the very heart of Qualcomm chips.
What is BootROM?
To grasp the severity of this discovery, we first need to look at how a modern device powered by a Qualcomm chip boots up. Think of it as a fortress with multiple layers of security. Each subsequent layer verifies the pass issued by the previous one. The bedrock foundation — the most trusted layer of them all — is the BootROM, a read-only memory baked directly into the silicon that can’t be modified once it comes off the fab.
The BootROM is the very first thing to run when a device powers on. It verifies the signature of the next bootloader, which in turn verifies the next, building a chain of trust all the way up to the operating system. If an attacker can compromise this chain at the BootROM level, it’s game over: the malicious code will execute before the main operating system even has a chance to load.
This is exactly what attackers can do by exploiting the CVE-2026-25262 vulnerability discovered by Kaspersky ICS CERT researchers.
Emergency Download Mode as an entry point
The research began with a protocol called Sahara. This is a component of Emergency Download Mode (EDL). Manufacturers and service centers use it to revive bricked devices: the phone is connected to a computer via USB, and a special utility program signed by the manufacturer (in this case, Qualcomm) is uploaded to it.
Sahara is implemented directly within the ARM PBL (Primary Boot Loader) — the BootROM itself. This means the protocol runs before any operating system boots, before any user access privileges are checked, and before any security controls are activated. The device simply waits for a USB connection, ready to accept data.
The communication scheme looks simple: the device sends a handshake (HELLO) to the computer, the computer selects the mode, a cycle begins to upload the utility program in chunks, and finally, the device executes the uploaded code. And it was within the verification logic of these very file chunks that the vulnerability was identified.
Write-what-where: the core of the vulnerability
In technical terms, the bug introduced by the developers is classified as CWE-123: Write-What-Where Condition. This is about as bad as it gets when it comes to flaws in low-level programming. An attacker can write arbitrary data to an arbitrary address in the device memory.
Without diving too deep into the technical weeds, suffice it to say that by exploiting the discovered vulnerability, attackers can gain access to any data on the device, including user-entered passwords, files, contacts, geolocation data, as well as the hardware sensors like the camera and microphone. In certain scenarios, complete control over the device is possible. Just a few minutes of physical access to the device via a cable connection, and the gadget has been compromised. This creates a risk if you hand your smartphone over to a repair shop, pass it to someone else to set up and install apps on, or just leave it unattended.
Which devices are affected
The CVE-2026-25262 vulnerability affects the following Qualcomm chip series: MDM9x07, MDM9x45, MDM9x65, MSM8909, MSM8916, MSM8952, and SDX50 — every single version released to date, until the vulnerability is patched by the manufacturer.
These are no obsolete museum pieces. The MDM9207, which we used for the bulk of our research, is integrated into modem modules for the internet of things (IoT), industrial equipment, smart home devices, healthcare monitoring systems, logistics trackers, and banking terminals. The MSM8916 powers many budget smartphones, while the SDX50 is used in automotive control units.
How vulnerable devices get attacked
The catch is that the attacker needs physical access to the device to pull this off. In the real world, this translates to:
Smartphone repairs at third-party repair shops, where the phone is left for several hours
Customs checkpoints in certain countries, where devices are withheld, inspected, and then returned
Lost and found scams, where your phone is stolen, tampered with, and then mysteriously found
Corporate espionage via an insider or a rogue employee
With just a few minutes of physical access to the device an attacker can plant a backdoor so deep inside that standard research tools won’t even detect it in most cases.
Why there’s no patch — and what to do
Qualcomm was notified of the discovery in March 2025 and confirmed the vulnerability in its chips. To identify it, the vendor reserved CVE-2026-25262, and on April 20, 2026, Kaspersky ICS CERT published technical information on the vulnerability and recommendations for users.
Qualcomm included this vulnerability in its May security bulletin. While fixing already-made devices is fundamentally impossible, the company promised to make all future chips without this vulnerability.
If you currently own a device with an affected chip, use our recommendations below to help mitigate the risk of infection.
Enforce strict physical control: don’t leave your devices unattended, especially when traveling or on business trips.
Choose only authorized service centers for repairs and maintenance.
Regularly update your firmware — this won’t patch the BootROM vulnerability, but it can eliminate many related vulnerabilities at higher levels.
Use a Kaspersky for Android on your device. This will safeguard your gadget from other threats that, combined with this vulnerability, could lead to unpredictable consequences.
If you notice that your gadget with a vulnerable Qualcomm chip starts acting up — overheating when idle, reporting unexpected spikes in network traffic, or exhibiting strange app behavior — you may have fallen victim to this vulnerability. You can wipe the malicious code and reset your device to its baseline state simply by completely cutting its power. This means either pulling the battery or letting it drain all the way to zero until the gadget shuts down entirely. In this case, the malicious code will most likely not persist on the device — during our research, we were unable to confirm that it could achieve persistence in non-volatile memory.
Want to learn more about severe vulnerabilities in Android phones? Check out these posts:
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