Sep 2026: Microsoft Excel Information Disclosure Vulnerability
CVE-2026-81401 Published on September 8, 2026
Microsoft Excel Information Disclosure Vulnerability
Access of resource using incompatible type ('type confusion') in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
Weakness Type
What is an Object Type Confusion Vulnerability?
The program allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type.
CVE-2026-81401 has been classified to as an Object Type Confusion vulnerability or weakness.
Products Associated with CVE-2026-81401
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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.
- Version 16.0.0.0 and below 16.0.10417.20207 is affected.