Jul 2026: Microsoft Word Remote Code Execution Vulnerability
CVE-2026-55132 Published on July 14, 2026
Microsoft Word Remote Code Execution Vulnerability
Double free in Microsoft Office Word allows an unauthorized attacker to execute code locally.
Weakness Type
What is a Double-free Vulnerability?
The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations. When a program calls free() twice with the same argument, the program's memory management data structures become corrupted. This corruption can cause the program to crash or, in some circumstances, cause two later calls to malloc() to return the same pointer. If malloc() returns the same value twice and the program later gives the attacker control over the data that is written into this doubly-allocated memory, the program becomes vulnerable to a buffer overflow attack.
CVE-2026-55132 has been classified to as a Double-free vulnerability or weakness.
Products Associated with CVE-2026-55132
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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 1.0.0 and below 16.111.26071215 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 16.111.26071215 is affected.
- Version 16.0.0 and below 16.111.26071215 is affected.
- Version 16.0.0 and below 16.0.5561.1001 is affected.
- Version 16.0.0 and below 16.0.10417.20175 is affected.
- Version 16.0.0 and below 16.0.19725.20434 is affected.
- Version 16.0.1 and below 16.0.5561.1000 is affected.