Nov 2026: Microsoft Office Excel Remote Code Execution Vulnerability
CVE-2026-118296 Published on November 10, 2026
Microsoft Office Excel Remote Code Execution Vulnerability
Double free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Vulnerability Analysis
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-2026-118296 has been classified to as a Double-free vulnerability or weakness.
Products Associated with CVE-2026-118296
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