HIGH 8.8 Microsoft
CVE-2026-78439
Microsoft Office Graphics Component Remote Code Execution Vulnerability
Microsoft Security Update 2026-Sep: Microsoft Office Graphics Component Remote Code Execution Vulnerability
Affected Products
- Microsoft Office LTSC for Mac 2021
- Microsoft Office for Android
- Microsoft Office LTSC for Mac 2024
- Microsoft Office 365 for Mac
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78439
- https://nvd.nist.gov/vuln/detail/CVE-2026-78439
This high severity vulnerability with a CVSS score of 8.8 was published on 2026-09-08 via Microsoft. Affected: Microsoft Office LTSC for Mac 2021, Microsoft Office for Android, Microsoft Office LTSC for Mac 2024 and 1 more.
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