CVE-2026-81957: Microsoft Excel Remote Code Execution Vulnerability
Microsoft Excel Remote Code Execution Vulnerability
Other sources
Out-of-bounds read 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 16.0.5569.1003Patch KB5002914 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.14334.20896 - Upgrade
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Fixed in 16.0.17932.20960 - Upgrade
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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 16.0.20326.20136
Event History
Frequently Asked Questions
What access and user interaction are required for exploitation?
The attack vector is local, requires no attacker privileges, and requires user interaction. The provided data does not describe the specific interaction or delivery method.
Which Excel and Office deployments are listed as affected?
The listed software includes Microsoft Excel 2016, Microsoft Office 2016, Microsoft 365 Apps for Enterprise, Office LTSC 2021 and 2024 for specified 32-bit and 64-bit editions, and Office LTSC for Mac 2021 and 2024.
What is the potential security impact if exploitation succeeds?
The CVSS vector rates confidentiality, integrity, and availability impacts as high. The vulnerability is described as allowing local code execution through an out-of-bounds read in Excel.