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CVE-2026-21514

Microsoft Word Security Feature Bypass Vulnerability

Published
Last modified
published
Listed in CISA KEV
Fix
Fixed in 16.106.26020821
None on Exploit-DB, Metasploit or GitHub

Summary

Microsoft Word, part of the Microsoft Office suite, is affected by this vulnerability. An attacker with local access could exploit it to bypass a built-in security feature because the software relies on untrusted input when making a security decision.

Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.

Read the original description

Reliance on untrusted inputs in a security decision in Microsoft Office Word allows an unauthorized attacker to bypass a security feature locally.

Timeline

  1. Added to CISA KEV

    CISA has evidence of exploitation in the wild

  2. CVE published
  3. CISA remediation deadline

    Due date for US federal agencies to patch

  4. Record last updated

Affected versions

  • Microsoft Microsoft 365 Apps for Enterprise

    From 16.0.1 · fixed in https://aka.ms/OfficeSecurityReleases

  • Microsoft Microsoft Office LTSC 2021

    From 16.0.1 · fixed in https://aka.ms/OfficeSecurityReleases

  • Microsoft Microsoft Office LTSC 2024

    From 16.0.0 · fixed in https://aka.ms/OfficeSecurityReleases

  • Microsoft Microsoft Office LTSC for Mac 2021

    From 16.0.1 · fixed in 16.106.26020821

  • Microsoft Microsoft Office LTSC for Mac 2024

    From 16.0.0 · fixed in 16.106.26020821

References 1

msrc.microsoft.com