Cybersecuritynews Microsoft Issues Urgent Patch for MSHTML Framework Zero-Day Vulnerability
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Microsoft has released a critical security patch for a zero-day vulnerability (CVE-2026-21513) in the MSHTML Framework, which was actively exploited before the fix was available. This vulnerability allows attackers to bypass Windows security features without elevated privileges, potentially affecting millions of systems. The flaw was added to the CISA KEV list on the same day it was published.
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Updated 182d ago How this analysis works
Timeline
2026-02-10
CVE-2026-21513 published
2026-02-10
CVE-2026-21513 added to CISA KEV (active exploitation)
2026-02-11
Microsoft released security patch for CVE-2026-21513
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