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Microsoft Issues Emergency Update for Windows 10 Security Flaws

First seen 2 Dec 2025, 18:33 UTC • •

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ThreatCluster •March 12, 2026 at 13:27 UTC

Microsoft has issued an emergency update for Windows 10 users following the cessation of default security updates on October 14, 2025. This update addresses a zero-day vulnerability affecting Windows 10, 11, and Server users, and resolves issues with registering for extended security updates (ESU).

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