CVE-2026-21514

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.

Affected

Microsoft · Microsoft 365 Apps for Enterprise · Microsoft Office LTSC 2021 · Microsoft Office LTSC 2024 · Microsoft Office LTSC for Mac 2021 · Microsoft Office LTSC for Mac 2024

CVSS v3.1 MICROSOFT

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

EPSS

1.59% chance of exploitation in the next 30 days, 75th percentile

CISA KEV

added 2026-02-10

Published

2026-02-10

Updated

2026-08-19

Proof-of-concept exploits (1)

• ChaitanyaHaritash/CVE-2026-21514_CVE-2026-215107★ · 2026-05-04

Security advisories

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21514

References

• CVE Record
• NVD entry

Related

• CVE-2026-21510