Sep 2026: Microsoft Excel Information Disclosure Vulnerability
CVE-2026-81394 Published on September 8, 2026
Microsoft Excel Information Disclosure Vulnerability
Exposure of sensitive system information to an unauthorized control sphere in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
Weakness Type
Exposure of Sensitive System Information to an Unauthorized Control Sphere
The application does not properly prevent sensitive system-level information from being accessed by unauthorized actors who do not have the same level of access to the underlying system as the application does.
Products Associated with CVE-2026-81394
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Affected Versions
Microsoft 365 Apps for Enterprise:- Version 16.0.1 and below 16.0.20326.20138 is affected.
- Version 16.0.0.0 and below 16.0.5569.1003 is affected.
- Version 16.0.0 and below 16.0.5569.1003 is affected.
- Version 19.0.0 and below 16.0.10417.20207 is affected.
- Version - is affected.
- Version 16.0.1 and below 16.0.14334.20906 is affected.
- Version 16.0.0 and below 16.0.17932.20976 is affected.
- Version - is affected.
- Version - is affected.