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Windows 11 Gets May 2026 Security Updates KB5089549, KB5087420
Microsoft released Windows 11 cumulative updates KB5089549 and KB5087420 on May 12, 2026, patching critical security vulnerabilities and adding new features.
KB5089549 is a May 2026 cumulative update that addresses security vulnerabilities and improves system stability for Windows 11 Version 24H2 and 25H2, updating builds to 26100.8457 and 26200.8457 respectively.
