Microsoft has released critical cumulative updates for Windows 11 versions 25H2, 24H2, and 23H2 as part of its February 2026 Patch Tuesday rollout. These updates—KB5077181, KB5075941, and KB5074105—focus on enhancing security and system performance, addressing vulnerabilities, and introducing quality improvements.
KB5077181: Security and Quality Rollup for 25H2/24H2
Targeting Windows 11 versions 25H2 and 24H2, KB5077181 integrates February’s security fixes with non-security enhancements from January’s optional preview. This update addresses critical vulnerabilities, including privilege escalation vectors and remote code execution flaws commonly exploited in ransomware attacks. Microsoft classifies this as a monthly quality update, distinct from out-of-band patches reserved for zero-day vulnerabilities. Administrators can monitor deployment via the Windows release health dashboard or version-specific histories.
KB5075941: Comprehensive Fixes for 23H2
For users on Windows 11 version 23H2, KB5075941 delivers a cumulative update that includes security mitigations and non-security improvements. This build addresses browser sandbox escapes and NTFS driver weaknesses, bolstering defenses against lateral movement in Active Directory breaches. With extended support through 2026, version 23H2 remains a compliance staple, necessitating vigilant endpoint detection and response integration.
KB5074105: Non-Security Enhancements for Newer Builds
Complementing the security-focused updates, KB5074105 offers non-security improvements for Windows 11 versions 25H2 and 24H2. This update enhances system reliability by fixing memory leaks in Defender telemetry and optimizing power profiles, indirectly aiding security by reducing crash-induced vulnerabilities.
Installation and Deployment
These updates are available through Windows Update and the Microsoft Update Catalog. Users are encouraged to install them promptly to ensure their systems remain secure and up-to-date. For enterprise environments, testing in staging environments is recommended to prevent potential issues.
Conclusion
Microsoft’s February 2026 cumulative updates for Windows 11 underscore the company’s commitment to maintaining a secure and reliable operating system. By addressing critical vulnerabilities and enhancing system performance, these updates play a vital role in protecting users against emerging cyber threats.
