Microsoft Patch Tuesday Updates for February 2026
- Feb 10
- 1 min read
Key Findings
Microsoft released security updates to address 58 new vulnerabilities across Windows, Office, Azure, Edge, Exchange, Hyper-V, and other components.
The update includes fixes for 6 zero-day vulnerabilities that are being actively exploited in the wild.
5 of the vulnerabilities were rated as "Critical" by Microsoft.
Several vulnerabilities affect high-profile targets like GitHub Copilot, IDEs, and Azure cloud services.
Background
This month's Patch Tuesday from Microsoft addresses a significant set of security issues, including 6 zero-day vulnerabilities that are already being actively exploited by attackers. The updates touch a wide range of Microsoft products, from the Windows operating system to cloud services and developer tools.
Windows Zero-Days
CVE-2026-21510: Security feature bypass in Windows Shell allowing bypass of security prompts.
CVE-2026-21513: Security feature bypass in MSHTML framework enabling code execution.
CVE-2026-21514: Security bypass in Microsoft Word allowing malicious code execution.
CVE-2026-21519: Privilege escalation in Desktop Window Manager.
CVE-2026-21533: Privilege escalation in Windows Remote Desktop Services.
CVE-2026-21525: Denial-of-service in Windows Remote Access Connection Manager.
Cloud and Developer Tool Vulnerabilities
CVE-2026-21228: Improper certificate validation in Azure Local enabling remote code execution.
CVE-2026-20841: Remote code execution vulnerability in Microsoft Notepad.
CVE-2026-21244, CVE-2026-21248: Remote code execution flaws in Windows Hyper-V.
CVE-2026-21516, CVE-2026-21523, CVE-2026-21256: Remote code execution vulnerabilities in GitHub Copilot.
Recommendations
Apply the February 2026 Patch Tuesday updates as soon as possible to address the actively exploited zero-day vulnerabilities.
Closely monitor systems and applications for any issues or regressions after applying the updates.
Review access controls and least-privilege principles, especially for developer and cloud-based tools.
Ensure robust backup and disaster recovery procedures are in place.
Sources
https://krebsonsecurity.com/2026/02/patch-tuesday-february-2026-edition/
https://blog.talosintelligence.com/microsoft-patch-tuesday-february-2026/
https://securityaffairs.com/187848/uncategorized/microsoft-patch-tuesday-security-updates-for-february-2026-fix-six-actively-exploited-zero-days.html
https://www.bleepingcomputer.com/news/microsoft/microsoft-february-2026-patch-tuesday-fixes-6-zero-days-58-flaws/
https://blog.qualys.com/vulnerabilities-threat-research/2026/02/10/microsoft-patch-tuesday-february-2026-security-update-review
https://www.lansweeper.com/blog/patch-tuesday/microsoft-patch-tuesday-february-2026/
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