Microsoft Just Broke (and Fixed) Extended Security Updates for Windows 10

The full story

This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

Microsoft Issues Emergency Update for Windows 10 Security Flaws 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). 7 sources 23