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May 12, 2026—KB5087420 (OS Build 22631.7079)

🗓️ 12 May 2026 14:00:00Reported by MicrosoftType 
mskb
 mskb
🔗 support.microsoft.com👁 14 Views

May 12, 2026 cumulative update for Windows 11 23H2 includes security fixes, improvements, and Secure Boot expiry notice.

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12 May 2026 14:00Current
6.7Medium risk
Vulners AI Score6.7
CVSS 47.3
CVSS 3.17 - 9.8
EPSS0.00257
SSVC
14