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VulnerabilitycriticalExploited in the wild

Microsoft Releases Patch for Exploited Office Zero Day

Infosecurity Magazineby Kevin Poireault ()1 min read4 · 1 read
Analyze CVE-2026-21509 with Vani AIImpact, affected versions, exploitation, mitigations and detection

Vulnerabilities mentioned

All
CVEVulnerabilityCVSSEPSSSignalsPublished
CVE-2026-21509
Local Security Feature Bypass in Microsoft Office Under Active Exploitation
7.871%KEV
KEV

From the original article

1 min read at infosecurity-magazine.com

A new high-severity zero-day vulnerability in Microsoft Office has been exploited in the wild, according to Microsoft. The tech giant released a patch in a January 26 advisory for the flaw which has been summarized as an over-reliance on untrusted inputs in a security decision in Microsoft Office that can allow an unauthorized attacker to bypass a security feature locally.

Infosecurity Magazine

By Kevin Poireault · infosecurity-magazine.com

Read the full article at Infosecurity Magazine

A short excerpt; the article and its images belong to the publisher. Summary, key facts and assessment above are AI-written from the article and can be wrong.