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CTEM in Practice: Prioritization, Validation, and Outcomes That Matter

Cybersecurity teams increasingly want to move beyond looking at threats and vulnerabilities in isolation. It’s not only about what could go wrong (vulnerabilities) or who might attack (threats), but where they intersect in your actual environment to create real, exploitable exposure. Which exposures truly matter? Can attackers exploit them? Are our defenses effective? Continuous Threat Exposure

Microsoft Office Zero-Day (CVE-2026-21509) - Emergency Patch Issued for Active Exploitation

Microsoft on Monday issued out-of-band security patches for a high-severity Microsoft Office zero-day vulnerability exploited in attacks. The vulnerability, tracked as CVE-2026-21509, carries a CVSS score of 7.8 out of 10.0. It has been described as a security feature bypass in Microsoft Office. "Reliance on untrusted inputs in a security decision in Microsoft Office allows an unauthorized

Critical Grist-Core Vulnerability Allows RCE Attacks via Spreadsheet Formulas

A critical security flaw has been disclosed in Grist‑Core, an open-source, self-hosted version of the Grist relational spreadsheet-database, that could result in remote code execution. The vulnerability, tracked as CVE-2026-24002 (CVSS score: 9.1), has been codenamed Cellbreak by Cyera Research Labs. "One malicious formula can turn a spreadsheet into a Remote Code Execution (RCE) beachhead,"

China-Linked Hackers Have Used the PeckBirdy JavaScript C2 Framework Since 2023

Cybersecurity researchers have discovered a JScript-based command-and-control (C2) framework called PeckBirdy that has been put to use by China-aligned APT actors since 2023 to target multiple environments. The flexible framework has been put to use against Chinese gambling industries and malicious activities targeting Asian government entities and private organizations, according to Trend Micro

Indian Users Targeted in Tax Phishing Campaign Delivering Blackmoon Malware

Cybersecurity researchers have discovered an ongoing campaign that's targeting Indian users with a multi-stage backdoor as part of a suspected cyber espionage campaign. The activity, per the eSentire Threat Response Unit (TRU), involves using phishing emails impersonating the Income Tax Department of India to trick victims into downloading a malicious archive, ultimately granting the threat

Malicious VS Code AI Extensions with 1.5 Million Installs Steal Developer Source Code

Cybersecurity researchers have discovered two malicious Microsoft Visual Studio Code (VS Code) extensions that are advertised as artificial intelligence (AI)-powered coding assistants, but also harbor covert functionality to siphon developer data to China-based servers. The extensions, which have 1.5 million combined installs and are still available for download from the official Visual Studio

⚑ Weekly Recap: Firewall Flaws, AI-Built Malware, Browser Traps, Critical CVEs & More

Security failures rarely arrive loudly. They slip in through trusted tools, half-fixed problems, and habits people stop questioning. This week’s recap shows that pattern clearly. Attackers are moving faster than defenses, mixing old tricks with new paths. β€œPatched” no longer means safe, and every day, software keeps becoming the entry point. What follows is a set of small but telling signals.

Winning Against AI-Based Attacks Requires a Combined Defensive Approach

If there’s a constant in cybersecurity, it’s that adversaries are always innovating. The rise of offensive AI is transforming attack strategies and making them harder to detect. Google’s Threat Intelligence Group, recently reported on adversaries using Large Language Models (LLMs) to both conceal code and generate malicious scripts on the fly, letting malware shape-shift in real-time to evade

Konni Hackers Deploy AI-Generated PowerShell Backdoor Against Blockchain Developers

The North Korean threat actor known as Konni has been observed using PowerShell malware generated using artificial intelligence (AI) tools to target developers and engineering teams in the blockchain sector. The phishing campaign has targeted Japan, Australia, and India, highlighting the adversary's expansion of the targeting scope beyond South Korea, Russia, Ukraine, and European nations, Check

Multi-Stage Phishing Campaign Targets Russia with Amnesia RAT and Ransomware

A new multi-stage phishing campaign has been observed targeting users in Russia with ransomware and a remote access trojan called Amnesia RAT. "The attack begins with social engineering lures delivered via business-themed documents crafted to appear routine and benign," Fortinet FortiGuard Labs researcher Cara Lin said in a technical breakdown published this week. "These documents and

New DynoWiper Malware Used in Attempted Sandworm Attack on Polish Power Sector

The Russian nation-state hacking group known as Sandworm has been attributed to what has been described as the "largest cyber attack" targeting Poland's power system in the last week of December 2025. The attack was unsuccessful, the country's energy minister, Milosz Motyka, said last week. "The command of the cyberspace forces has diagnosed in the last days of the year the strongest attack on

Who Approved This Agent? Rethinking Access, Accountability, and Risk in the Age of AI Agents

AI agents are accelerating how work gets done. They schedule meetings, access data, trigger workflows, write code, and take action in real time, pushing productivity beyond human speed across the enterprise. Then comes the moment every security team eventually hits: β€œWait… who approved this?” Unlike users or applications, AI agents are often deployed quickly, shared broadly,

CISA Adds Actively Exploited VMware vCenter Flaw CVE-2024-37079 to KEV Catalog

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Friday added a critical security flaw affecting Broadcom VMware vCenter Server that was patched in June 2024 to its Known Exploited Vulnerabilities (KEV) catalog, citing evidence of active exploitation in the wild. The vulnerability in question is CVE-2024-37079 (CVSS score: 9.8), which refers to a heap overflow in the

CISA Updates KEV Catalog with Four Actively Exploited Software Vulnerabilities

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Thursday added four security flaws to its Known Exploited Vulnerabilities (KEV) catalog, citing evidence of active exploitation in the wild. The list of vulnerabilities is as follows - CVE-2025-68645 (CVSS score: 8.8) - A PHP remote file inclusion vulnerability in Synacor Zimbra Collaboration Suite (ZCS) that could allow a

Fortinet Confirms Active FortiCloud SSO Bypass on Fully Patched FortiGate Firewalls

Fortinet has officially confirmed that it's working to completely plug a FortiCloud SSO authentication bypass vulnerability following reports of fresh exploitation activity on fully-patched firewalls. "In the last 24 hours, we have identified a number of cases where the exploit was to a device that had been fully upgraded to the latest release at the time of the attack, which suggested a new

TikTok Forms U.S. Joint Venture to Continue Operations Under 2025 Executive Order

TikTok on Friday officially announced that it formed a joint venture that will allow the hugely popular video-sharing application to continue operating in the U.S. The new venture, named TikTok USDS Joint Venture LLC, has been established in compliance with the Executive Order signed by U.S. President Donald Trump in September 2025, the platform said. The new deal will see TikTok's Chinese

Phishing Attack Uses Stolen Credentials to Install LogMeIn RMM for Persistent Access

Cybersecurity researchers have disclosed details of a new dual-vector campaign that leverages stolen credentials to deploy legitimate Remote Monitoring and Management (RMM) software for persistent remote access to compromised hosts. "Instead of deploying custom viruses, attackers are bypassing security perimeters by weaponizing the necessary IT tools that administrators trust," KnowBe4 Threat

Microsoft Flags Multi-Stage AitM Phishing and BEC Attacks Targeting Energy Firms

Microsoft has warned of a multi‑stage adversary‑in‑the‑middle (AitM) phishing and business email compromise (BEC) campaign targeting multiple organizations in the energy sector. "The campaign abused SharePoint file‑sharing services to deliver phishing payloads and relied on inbox rule creation to maintain persistence and evade user awareness," the Microsoft Defender Security Research Team said.

New Osiris Ransomware Emerges as New Strain Using POORTRY Driver in BYOVD Attack

Cybersecurity researchers have disclosed details of a new ransomware family called Osiris that targeted a major food service franchisee operator in Southeast Asia in November 2025. The attack leveraged a malicious driver called POORTRY as part of a known technique referred to as bring your own vulnerable driver (BYOVD) to disarm security software, the Symantec and Carbon Black Threat Hunter

Critical GNU InetUtils telnetd Flaw Lets Attackers Bypass Login and Gain Root Access

A critical security flaw has been disclosed in the GNU InetUtils telnet daemon (telnetd) that went unnoticed for nearly 11 years. The vulnerability, tracked as CVE-2026-24061, is rated 9.8 out of 10.0 on the CVSS scoring system. It affects all versions of GNU InetUtils from version 1.9.3 up to and including version 2.7. "Telnetd in GNU Inetutils through 2.7 allows remote authentication bypass

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