Sep 2026: Microsoft Office Word Remote Code Execution Vulnerability
CVE-2026-77901 Published on September 8, 2026
Microsoft Office Word Remote Code Execution Vulnerability
Null pointer dereference in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
Weakness Type
NULL Pointer Dereference
A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. NULL pointer dereference issues can occur through a number of flaws, including race conditions, and simple programming omissions.
Products Associated with CVE-2026-77901
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Affected Versions
Microsoft 365 Apps for Enterprise:- Version 16.0.1 and below 16.0.20326.20138 is affected.
- Version 19.0.0 and below 16.0.10417.20207 is affected.
- Version 1.0.0 and below 16.113.26091433 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 16.0.1 and below 16.113.26091433 is affected.
- Version 16.0.0 and below 16.113.26091433 is affected.
- Version 16.0.1 and below 16.0.5569.1000 is affected.