HIGH 7.8 Microsoft
CVE-2026-42831
Microsoft Office Remote Code Execution Vulnerability
Microsoft Security Update 2026-May: Microsoft Office Remote Code Execution Vulnerability
Affected Products
- Microsoft Office LTSC for Mac 2021
- Microsoft Office for Android
- Microsoft Office LTSC for Mac 2024
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42831
- https://nvd.nist.gov/vuln/detail/CVE-2026-42831
This high severity vulnerability with a CVSS score of 7.8 was published on 2026-05-12 via Microsoft. Affected: Microsoft Office LTSC for Mac 2021, Microsoft Office for Android, Microsoft Office LTSC for Mac 2024.
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