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CVE-2026-21514

HighCVSS 7.8/10Known exploited (CISA KEV)Last modified Jun 17, 2026

Description

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

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness enumeration

Affected software

Vendor	Product	Versions
Microsoft	Microsoft 365 Apps for Enterprise	>= 16.0.1, < https://aka.ms/OfficeSecurityReleases
Microsoft	Microsoft Office LTSC 2021	>= 16.0.1, < https://aka.ms/OfficeSecurityReleases
Microsoft	Microsoft Office LTSC 2024	>= 16.0.0, < https://aka.ms/OfficeSecurityReleases
Microsoft	Microsoft Office LTSC for Mac 2021	>= 16.0.1, < 16.106.26020821
Microsoft	Microsoft Office LTSC for Mac 2024	>= 16.0.0, < 16.106.26020821

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21514Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-21514US Government Resource

Timeline

Published: Feb 10, 2026
Last modified: Jun 17, 2026
Added to CISA KEV: Feb 10, 2026
NVD status: Analyzed

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