CVE-2026-81953: Microsoft Excel Remote Code Execution Vulnerability
Microsoft Excel Remote Code Execution Vulnerability
Other sources
Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.14334.20896 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.5569.1003Patch KB5002904 - Upgrade
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Fixed in 16.0.17932.20960 - Upgrade
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Fixed in 16.0.10417.20204Patch KB5002910 - Upgrade
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Fixed in 16.0.5569.1003Patch KB5002914 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.20326.20136
Event History
Frequently Asked Questions
What level of access does an attacker need to exploit this vulnerability?
The attacker does not need prior privileges. Exploitation requires local attack-vector conditions and user interaction, as indicated by AV:L, PR:N, and UI:R.
What is the potential impact if exploitation succeeds?
An attacker could execute code locally through a stack-based buffer overflow in Excel. The CVSS vector indicates high impact to confidentiality, integrity, and availability.
Which Microsoft products are listed as affected?
The listed software includes Microsoft Office 2016, Microsoft Excel 2016, Microsoft 365 Apps for Enterprise, Microsoft Office 365 for Mac, Microsoft Office 2019 for 64-bit editions, and Microsoft Office LTSC 2021 and 2024 for specified 32-bit or 64-bit editions.