Oct 2026: Microsoft Office Click-To-Run Elevation of Privilege Vulnerability
CVE-2026-97774 Published on October 13, 2026
Microsoft Office Click-To-Run Elevation of Privilege Vulnerability
Time-of-check time-of-use (toctou) race condition in Microsoft Office Click-To-Run allows an authorized attacker to elevate privileges locally.
Weakness Type
What is a TOCTTOU Vulnerability?
The software checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check. This can cause the software to perform invalid actions when the resource is in an unexpected state. This weakness can be security-relevant when an attacker can influence the state of the resource between check and use. This can happen with shared resources such as files, memory, or even variables in multithreaded programs.
CVE-2026-97774 has been classified to as a TOCTTOU vulnerability or weakness.
Products Associated with CVE-2026-97774
Want to know whenever a new CVE is published for Microsoft 365 Apps? stack.watch will email you.
Affected Versions
Microsoft 365 Apps for Enterprise:- Version 16.0.1 and below https://aka.ms/OfficeSecurityReleases is affected.