HIGH 7.5 Microsoft
CVE-2026-77898
Microsoft Office Remote Code Execution Vulnerability
Microsoft Security Update 2026-Sep: Microsoft Office Remote Code Execution Vulnerability
Affected Products
- Microsoft Office LTSC 2024 for 32-bit editions
- Microsoft Office LTSC 2021 for 64-bit editions
- Microsoft Office LTSC 2021 for 32-bit editions
- Microsoft Office 2019 for 64-bit editions
- Microsoft Office 2019 for 32-bit editions
- Microsoft Office LTSC 2024 for 64-bit editions
- Microsoft 365 Apps for Enterprise for 32-bit Systems
- Microsoft 365 Apps for Enterprise for 64-bit Systems
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-77898
- https://nvd.nist.gov/vuln/detail/CVE-2026-77898
This high severity vulnerability with a CVSS score of 7.5 was published on 2026-09-08 via Microsoft. Affected: Microsoft Office LTSC 2024 for 32-bit editions, Microsoft Office LTSC 2021 for 64-bit editions, Microsoft Office LTSC 2021 for 32-bit editions and 5 more.
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