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September 9, 2025—KB5065431 (OS Builds 22621.5909 and 22631.5909)

🗓️ 14 Oct 2025 14:00:00Reported by MicrosoftType 
mskb
 mskb
🔗 support.microsoft.com👁 10 Views

Secure Boot certificates expire in June 2026; Windows 11 22H2 ends non-security previews; security updates continue through October 2025; upgrade to latest Windows 11.

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14 Oct 2025 14:00Current
10High risk
Vulners AI Score10
CVSS 3.18.8 - 9.8
EPSS0.04764
SSVC
10