CVE-2026-97774
7.0HighPublished 13 Oct 2026 · NVD status: Analyzed · AI triage by gemini-3.8-flash
- Attack vector
- Local
- Complexity
- High
- Privileges needed
- Low
- User interaction
- None
- Impact
- Full C/I/A compromise
- Weakness
- CWE-367
Impact
A local attacker with an existing account can escalate privileges to execute code with elevated permissions. They require prior local access to the system to exploit the flaw.
Root cause
A time-of-check to time-of-use (TOCTOU) race condition in Microsoft Office Click-To-Run allows an attacker to alter resources between validation and execution.
Affected systems
Versions not listed — check the vendor advisory.
CVSS v3.1 · CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Fix & remediation
Apply the official patch via the Microsoft Click-To-Run update channel once released, or restrict standard user access to the local machine until patched.
$ "C:\Program Files\Common Files\microsoft shared\ClickToRun\OfficeC2RClient.exe" /update userAI-suggested. Run it in staging first and check it against the vendor advisory. Why?
NVD description
Time-of-check time-of-use (toctou) race condition in Microsoft Office Click-To-Run allows an authorized attacker to elevate privileges locally.