May 2026: Microsoft Word Remote Code Execution Vulnerability
CVE-2026-40367 Published on May 12, 2026
Microsoft Word Remote Code Execution Vulnerability
Untrusted pointer dereference in Microsoft Office Word allows an unauthorized attacker to execute code locally.
Weakness Type
Untrusted Pointer Dereference
The program obtains a value from an untrusted source, converts this value to a pointer, and dereferences the resulting pointer.
Products Associated with CVE-2026-40367
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Affected Versions
Microsoft 365 Apps for Enterprise:- Version 16.0.1 and below https://aka.ms/OfficeSecurityReleases is affected.
- Version 19.0.0 and below https://aka.ms/OfficeSecurityReleases is affected.
- Version 16.0.1 and below https://aka.ms/OfficeSecurityReleases is affected.
- Version 16.0.0 and below https://aka.ms/OfficeSecurityReleases is affected.
- Version 16.0.1 and below 16.109.26051019 is affected.
- Version 16.0.0 and below 16.109.26051019 is affected.
- Version 16.0.0 and below 16.0.5552.1002 is affected.
- Version 16.0.0 and below 16.0.10417.20128 is affected.
- Version 16.0.0 and below 16.0.19725.20280 is affected.
- Version 16.0.1 and below 16.0.5552.1000 is affected.