CVE-2026-97774: Microsoft Office Click-To-Run Elevation of Privilege Vulnerability
Microsoft Office Click-To-Run Elevation of Privilege Vulnerability
Other sources
Time-of-check time-of-use (toctou) race condition in Microsoft Office Click-To-Run allows an authorized attacker to elevate privileges locally.
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in https://aka.ms/OfficeSecurityReleases
Event History
Frequently Asked Questions
Who is exposed to this issue?
Systems running Microsoft 365 Apps for Enterprise are in scope. Exploitation requires an attacker to already have authorized local access to the affected system.
Can this be exploited remotely or without user interaction?
The supplied vector identifies local attack access and no user interaction requirement. The attacker must have low privileges, and successful exploitation can result in elevated local privileges.
What security impact could successful exploitation have?
Successful exploitation can allow the attacker to elevate privileges locally. The provided impact ratings indicate high potential impact to confidentiality, integrity, and availability.