Nov 2026: Microsoft Office Excel Remote Code Execution Vulnerability
CVE-2026-118712 Published on November 10, 2026

Microsoft Office Excel Remote Code Execution Vulnerability
Integer underflow (wrap or wraparound) in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.

Vendor Advisory NVD

Vulnerability Analysis

Exploitation:
NONE
Automatable:
NO
Technical Impact:
TOTAL

Weakness Type

What is an Integer underflow Vulnerability?

The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result. This can happen in signed and unsigned cases.

CVE-2026-118712 has been classified to as an Integer underflow vulnerability or weakness.


Products Associated with CVE-2026-118712

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Affected Versions

Microsoft 365 Apps for Enterprise: Microsoft Office 365 for Mac: Microsoft Office LTSC 2021: Microsoft Office LTSC 2024: Microsoft Office LTSC for Mac 2021: Microsoft Office LTSC for Mac 2024: Microsoft Office Online Server: