CVE-2026-81399: Microsoft Excel Information Disclosure Vulnerability
Buffer over-read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
Other sources
Microsoft Excel Information Disclosure 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 16.0.17932.20960 - 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 16.0.10417.20204Patch KB5002910 - 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 16.0.14334.20896
Event History
Frequently Asked Questions
What access and user interaction are required for exploitation?
The vulnerability is locally exploitable and does not require attacker privileges. Exploitation requires user interaction.
What is the security impact if exploitation succeeds?
Successful exploitation can disclose information. The supplied vector indicates no integrity or availability impact.
Which products are identified as affected?
The affected software list includes Microsoft Office 2016, Microsoft Excel 2016, Microsoft 365 Apps for Enterprise, Microsoft Excel, Microsoft Office 365 for Mac, Microsoft Office LTSC 2024 for 64-bit editions, Microsoft Office LTSC for Mac 2024, and Microsoft Office 2019 for 64-bit editions.