CVE-2026-81949: Microsoft Excel Remote Code Execution Vulnerability
Integer overflow or wraparound in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Other sources
Microsoft Excel Remote Code Execution Vulnerability
— 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 16.0.20326.20136 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.5569.1003Patch KB5002914 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.5569.1003Patch KB5002904 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.17932.20960 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.10417.20204Patch KB5002910
Event History
Frequently Asked Questions
What level of access does an attacker need to exploit this vulnerability?
The attacker does not need prior privileges, but exploitation requires local access and user interaction. The supplied severity vector indicates the attack vector is local and that a user must take an action.
Which deployments should be assessed for exposure?
Assess systems running Microsoft Excel 2016, Microsoft Office 2016, Microsoft 365 Apps for Enterprise, Microsoft Office LTSC 2021 for 64-bit editions, Microsoft Office 365 for Mac, Microsoft Office LTSC for Mac 2024, or Microsoft Office LTSC 2024 for 32-bit or 64-bit editions.
What is the potential impact if exploitation succeeds?
Successful exploitation can allow local code execution. The severity vector rates confidentiality, integrity, and availability impact as high.