CVE-2026-81393: Microsoft Excel Information Disclosure Vulnerability
Microsoft Excel Information Disclosure Vulnerability
Other sources
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information 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 KB5002904 - 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 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 16.0.20131.20246 - 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 does an attacker need to exploit this issue?
The attacker needs local access and user interaction. No privileges are required, but the affected user must interact with the exploit.
What is the potential impact?
Successful exploitation can disclose information through an out-of-bounds read in Microsoft Excel. The provided severity vector indicates confidentiality impact only; integrity and availability are not affected.
Which deployments are identified as affected?
The affected software list includes Microsoft Office 2016, Microsoft Excel 2016, Microsoft 365 Apps for Enterprise, Office LTSC 2021 for 32-bit editions, Office LTSC for Mac 2021, Office 365 for Mac, and Office LTSC 2024 for both 32-bit and 64-bit editions.