HIGH 7.4 Microsoft
CVE-2026-21521
Word Copilot Information Disclosure Vulnerability
Microsoft Security Update 2026-Jan: Word Copilot Information Disclosure Vulnerability
Affected Products
- Microsoft 365 Word Copilot
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21521
- https://nvd.nist.gov/vuln/detail/CVE-2026-21521
This high severity vulnerability with a CVSS score of 7.4 was published on 2026-01-13 via Microsoft. Affected: Microsoft 365 Word Copilot.
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