Microsoft February 2026 Patch Tuesday Fixes 54 Vulnerabilities, Including 6 Zero-Days - cyberpress.org
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Microsoft February 2026 Patch Tuesday Fixes 54 Vulnerabilities, Including 6 Zero-Days
By AnuPriya
February 11, 2026
Categories:
Cyber Security NewsCybersecurityMicrosoftVulnerabilitiesZero-day
Microsoft’s February 2026 Patch Tuesday dropped with major urgency, fixing 54 security flaws across Windows, Office, Exchange, Azure, and more.
The standout issue? Six zero-day vulnerabilities are already under active attack in the wild. These are bugs hackers exploited before Microsoft could patch them. IT teams must apply these updates now to avoid breaches.
Zero-days let attackers slip past defenses silently. This batch includes feature bypasses, privilege escalations, and crashes that could hand over full system control.
Delaying patches risks ransomware, data theft, or remote takeovers, especially on internet-facing servers.
The Six Actively Exploited Zero-Days
These flaws demand top priority. Attackers use them right now, often via malicious files or remote access.
CVE ID Vulnerability Title Severity CVSS Score
CVE-2026-21510 Windows Shell Security Feature Bypass Important 7.8
CVE-2026-21513 MSHTML Platform Security Feature Bypass Important 7.5
CVE-2026-21514 Microsoft Word Security Feature Bypass Important 7.8
CVE-2026-21519 Desktop Window Manager Elevation of Privilege Important 7.8
CVE-2026-21525 Windows Remote Access Connection Manager DoS Important 7.5
CVE-2026-21533 Windows Remote Desktop Services EoP Important 7.8
CVE-2026-21510: Bypasses “Mark of the Web” warnings on risky downloads.
CVE-2026-21519: Type confusion in Desktop Window Manager lets low-priv users grab SYSTEM rights.
CVE-2026-21533: Remote Desktop flaw boosts authenticated users to admin.
Patch these first tests in staging if needed, but roll out fast.
Beyond zero-days, key fixes hit enterprise targets like Exchange and Azure.
CVE ID Vulnerability Title Severity Type
CVE-2026-21527 Microsoft Exchange Server Spoofing Critical Spoofing/RCE
CVE-2026-23655 Azure Container Instances Info Disclosure Critical Info Disclosure
CVE-2026-21518 GitHub Copilot/VS Code RCE Important RCE/Command Injection
CVE-2026-21528 Azure IoT SDK Vulnerability Important RCE
CVE-2026-21531 Azure SDK Vulnerability Important RCE
CVE-2026-21222 Windows Kernel Info Disclosure Important Info Disclosure
Exchange’s CVE-2026-21527 enables remote code execution via spoofing prime for APTs. Azure patches cover IoT, containers, and Arc, plugging cloud leaks.
Patches split like this, showing elevation of privilege as the biggest threat:
Type Count Key Risk Example
Elevation of Privilege 25 Gaining admin rights (e.g., DWM)
Remote Code Execution 12 Server takeovers (Exchange)
Spoofing 7 NTLM tricks
Information Disclosure 6 Data leaks
Security Feature Bypass 5 Dodging MoTW/Defender
Denial of Service 3 VPN crashes
This is a “patch immediately” release. Prioritize zero-days, Exchange, and Azure. Use WSUS or Intune for bulk deployment.
Monitor for exploits via Microsoft Defender or tools like Nessus. Stay safe; unpatched systems are sitting ducks.
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AnuPriya
Any Priya is a cybersecurity reporter at Cyber Press, specializing in cyber attacks, dark web monitoring, data breaches, vulnerabilities, and malware. She delivers in-depth analysis on emerging threats and digital security trends.
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