Microsoft Office LTSC 2021

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• High 7.8
  CVE-2026-21514 Exploited Public exploit

  Microsoft Word Security Feature Bypass Vulnerability

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

  Microsoft Microsoft 365 Apps for Enterprise Microsoft Office LTSC 2021 Microsoft Office LTSC 2024
  Feb 10, 2026

  KEV Feb 10, 2026
• High 7.8
  CVE-2026-21509 Exploited Public exploit EPSS 71%

  Microsoft Office Security Feature Bypass Vulnerability

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

  Microsoft Microsoft 365 Apps for Enterprise Microsoft Office LTSC 2021 Microsoft Office LTSC 2024
  Jan 26, 2026

  KEV Jan 26, 2026
• High 7.8
  CVE-2021-42292 Exploited Public exploit EPSS 43%

  Microsoft Excel Security Feature Bypass Vulnerability

  Microsoft Excel Security Feature Bypass Vulnerability

  Microsoft Microsoft 365 Apps for Enterprise Microsoft Office LTSC 2021 Microsoft Office LTSC for Mac 2021
  Nov 10, 2021

  KEV Nov 17, 2021