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Microsoft Plugs Nearly 400 Security Holes

Microsoft today released updates to remedy at least 398 security vulnerabilities in its Windows operating systems and supported software, including one weakness that is already being actively exploited and two others that were publicly detailed prior to today.

Image: Shutterstock, Mallika Home Studio.

August’s overstuffed bundle of patch joy from Microsoft did not eclipse its recording breaking release of more than 570 security updates last month, but it is double June’s then-record batch of nearly 200 fixes. Microsoft has attributed the recent patch deluge to vulnerability discoveries aided by artificial intelligence, and experts roundly agree that Windows users should get used to the idea of Patch Tuesdays (the second Tuesday of each month) covering hundreds of newly discovered security flaws.

Fully 42 of the 398 flaws that Microsoft patched today earned Redmond’s most-dire “critical” rating, meaning they are severe enough that malware or malcontents could exploit them to gain remote control over a Windows computer with little to no help from the user.

The sole known “zero day” bug fixed by Microsoft this month is CVE-2026-68820, a privilege escalation weakness in a core Windows component called afd.sys, which the security firm Automox describes as “the driver behind Windows socket connections on effectively every endpoint.”

“This isn’t a front-door bug,” Automox’s Landon Miles wrote in a Patch Tuesday blog post. “It’s step two in a chain: an attacker phishes their way into a low-privilege foothold, then uses the driver flaw to take the box. The 7.0 score reflects the high attack complexity, because race conditions are fiddly. The exploit has to be thrown over and over until the timing lands. Someone is clearly landing it anyway.”

CVE-2026-62832 is another privilege escalation flaw that Microsoft has labeled likely to be exploited; this flaw, in the Windows User Profile Service, may be related to the recent “LegacyHive” public disclosure from the prolific bug hunter known as Nightmare Eclipse. The other publicly disclosed flaw is CVE-2026-72971, a low-impact local tampering vulnerability that Microsoft reckons is unlikely to be exploited.

Other major software makers are likewise increasing their patch volumes and cadence thanks to AI, including Adobe which last month moved to twice-monthly security bulletins published on the 2nd and 4th Tuesday of each month. Cisco, Google, Mozilla and Oracle also are shipping updates far more frequently and abundantly.

By all accounts, AI is quite good at finding security holes in software. But for now at least, patching the resulting bugpocalypse remains a heavily human-centric endeavor, and the jury is still out on whether AI technologies will turn out to be as good at fixing vulnerabilities as they are at finding and exploiting them. This is an important question when one considers that these same AI technologies also are suggesting fixes for the vulnerabilities they find.

Researchers at 1Password recently examined what happens when different large language models (LLMs) generate vulnerability patches for newly disclosed, complex vulnerabilities. They found the LLMs produced patches that failed to fix the flaw or added a new weakness in the process (or both) more than half the time.

Ed Skoudis, president of the SANS Technology Institute, said his team has seen excellent results using AI to generate patches, provided there are humans in the loop to test the suggested fixes and push for iterative improvements.

“AI is rapidly becoming astonishingly good at finding vulnerabilities, but this research shows that fixing them is a very different problem,” Skoudis wrote in a SANS newsletter today. “Don’t expect one-shot AI patching to work reliably. Instead, iterate, test, challenge, improve, and verify. AI can be an extraordinary patching partner, but today it still needs a skilled human at the keyboard.”

Tyler Reguly at Fortra says while reports of Microsoft patching hundreds of vulnerabilities in one go have prompted some organizations to try to patch faster, it’s important to bear in mind that only one of the almost 400 bugs addressed today is known to be actively exploited. Reguly suggested security leaders check in with their teams to see how they’re handling the increasing workloads, which often involve testing fixes before deploying them in production environments.

“If you’re a chief security officer talk to your teams about how they are shifting or modifying their workflows to better accommodate the patching shift that we’re seeing and support them across various organizational units by enabling the changes they want to see made,” Reguly said. “There’s no need to rush these updates, no matter what various vendors and organizations try to tell you. You need to make sure that you are rolling out safe updates that will not negatively impact your systems.”

Speaking of the humans behind the keyboards, don’t neglect to backup your system and/or data before applying this month’s monster patch load. The day after each month’s Patch Tuesday is sometimes derisively referred to as Reboot Wednesday, but it generally doesn’t hurt to wait a few days to apply these huge update bundles because it sometimes takes a couple of days for the occasional misbehaving patch to get ironed out properly by Microsoft.

For a clickable, per-patch breakdown by severity and urgency, check out this roundup from the SANS Internet Storm Center.

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1Password Teams With OpenAI to Stop AI Coding Agents From Leaking Credentials

1Password says AI coding agents should never hold persistent secrets, introducing a just-in-time credential model for OpenAI Codex designed to keep credentials out of prompts, code repositories, and model context.

The post 1Password Teams With OpenAI to Stop AI Coding Agents From Leaking Credentials appeared first on SecurityWeek.

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Password Managers Vulnerable to Vault Compromise Under Malicious Server

Researchers at ETH Zurich have tested the security of Bitwarden, LastPass, Dashlane, and 1Password password managers.

The post Password Managers Vulnerable to Vault Compromise Under Malicious Server appeared first on SecurityWeek.

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Strengthen your digital defenses on World Password Day

In today’s digital world, passwords have become a necessary part of life. But even though you use them for almost everything you do online, you probably don’t give them the thought they truly deserve. May 1, 2025, is World Password Day, a reminder that passwords are the unsung heroes of cybersecurity, the first line of defense for all your sensitive personal data. This annual event encourages you to level up your password game and strengthen your online defenses. World Password Day is more relevant than ever in today’s evolving threat landscape.

Data breaches are on the rise, and according to the 2024 Verizon Data Breach Investigations Report, a staggering 81% of them are linked to weak or compromised passwords. The bottom line? If you’re still relying on “Fluffy123”, you could be putting your personal information at risk. Let’s explore password-based attacks, and some steps you can take to lock down your logins, once and for all.

Threats to your passwords

Managing all your passwords can be a hassle. They’re easy to forget and hard to keep track of, so people tend to use and reuse simple passwords they can remember. But here’s the issue – cybercriminals are getting smarter and their attacks are only getting more sophisticated. If a scammer gains access to your personal details, they can create havoc with your finances and cause you stress for years to come. In the past, brute force attacks were the go-to method, which involved simply using trial and error to crack passwords. Today, hackers use much more complex methods – here are a few examples.

  • Password phishing: In a phishing attack, scammers will use emails, phone calls, or texts to pose as trusted businesses and service providers. They may send you a fake invoice to pay. They might offer you an amazing deal on an upgraded service. Sometimes they threaten to cut off a service if you don’t respond immediately. The goal is to trick you into giving up your username and password so they can access your data and steal your money. 
  • Credential stuffing: Once hackers have your login details, they often try what’s called credential stuffing – using your stolen credentials (username and password combinations) to try and break into your other accounts. Why does this work so often? Because more than two in three people admit they reuse passwords across multiple accounts.
  • Malware: Infostealer malware can be used by hackers in the background to steal your personal information including your passwords. Once the malware is on your device it can search your web browsers, email clients, digital wallets, files, applications, etc. looking for sensitive information. They can even look for old forms you filled out with passwords, record your keyboard strokes, and take screenshots of your computer dashboard.  The malware then sends this information back to hackers’ servers, sometimes within seconds.  Hackers can use this type of malware for large attacks as seen by the targeted attack on Snowflake customers.

Password security checklist

  •  Create strong passwords

    Longer is stronger: Aim for passwords that are at least 16 characters long. Research shows this number of characters takes exponentially longer to crack.

    Difficulty matters: “12345” may be an easy password to remember, but it isn’t going to keep the cybercriminals away. Create a unique mix of uppercase, lowercase, numbers, and symbols for each password.

    Be unpredictable: Avoid using obvious patterns and personal details that will be easy for hackers to figure out. This means no street addresses or phone numbers, and especially no personal details you might be sharing on social media.

    Did you know? More than 50% of people admit to using familiar names for their passwords, such as their kid’s name or their pet’s name. 15% said they use their own first name in their passwords!
  • Change reused passwords
    If you’re reusing the same password across accounts, it’s time for a refresh. All it takes is one compromised account for a hacker to potentially unlock dozens more. Start with your most sensitive accounts, such as banking, email, and healthcare and update those first.

    Did you know? According to a study by Forbes Advisor, on average, people reuse the same password for at least four accounts.
  • Use multi-factor authentication
    Even if a hacker obtains your password, you can still stop them in their tracks by adding a second layer of security to your login process. Multi-factor authentication (MFA) includes things like one-time codes sent to your phone or scans of biometric features, such as your face or fingerprints.
    Did You Know? Using MFA can stop over 99% of account compromise attacks.
  • Consider using passphrases or passkeys
    These are two alternatives to passwords that you might want to consider.

    • A passphrase is a string of unrelated words that’s easy to recall and tough to crack. For example, something nonsensical like “FancyGoldEmuDancing “ will be hard for a hacker to guess, but it might be easier for you to memorize than a string of numbers and symbols.
    • A passkey is an authentication method that uses biometric data, like facial recognition or a fingerprint. It can also use a swipe pattern (a three-by-three grid of dots) or a PIN. A passkey is used across all your devices, creating a password-free login.

      Did you know? Not only does signing in with a passkey make your data              much more secure, it’s also three times faster than using a conventional
      password.
  • Use a password manager
    Password managers are tools that make your life easier by doing the hard work for you. By automatically generating and storing your strong passwords, they reduce the risk of recycled or forgotten logins and provide secure access across all your devices. Webroot solutions include password managers and much more, including features like real-time phishing detection to prevent credential theft.

    Did you know? Users who rely on password managers are less likely to experience identity theft or credential theft than those who don’t.
  • Protect your devices          
    Antivirus software scans detect and defend against any virus or malicious program like malware, trojans, adware and more that might cause damage to your devices. Webroot products offer robust antivirus protection that continuously scours the internet to identify and block the latest threats.

    Did you know? Hackers are moving away from browser-based attacks and embedding malicious software into everyday files like documents, installers and media. More than 50% of all consumer malware now enters through downloads and desktop.

Never forget that your passwords are the very foundation of your digital defense strategy. With cyberattacks becoming more and more sophisticated, creating strong passwords is no longer optional – it’s essential. This World Password Day, take the time to check in on your password practices. Update those old logins, enable MFA, and let Webroot do the heavy lifting. Just a few simple steps today can save you a world of trouble tomorrow.

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The post Strengthen your digital defenses on World Password Day appeared first on Webroot Blog.

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