CVE-2026-81951: Microsoft Excel Remote Code Execution Vulnerability
Heap-based buffer overflow 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 16.0.5569.1003Patch KB5002904 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.10417.20204Patch KB5002910 - 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 16.0.17932.20960 - 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 16.0.20131.20246
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.
What is the potential impact if exploitation succeeds?
Successful exploitation can allow code execution with high confidentiality, integrity, and availability impact.
Which products should be assessed for exposure?
Assess Microsoft Office 2016, Microsoft Excel 2016, Microsoft 365 Apps for Enterprise, Office 2019 32-bit editions, Office 365 for Mac, Office LTSC for Mac 2024, and Office LTSC 2024 for both 32-bit and 64-bit editions.