CVE-2026-92369
Time-of-check Time-of-use (TOCTOU) Race Condition in TeamViewer Windows Installer Rollback Mechanism Leads to Local Privilege Escalation
- State
- Published
- Severity
- 7.3 High
- Published
- Sep 29, 2026
- Updated
- Sep 30, 2026
- Reserved
- Sep 16, 2026
Description
TeamViewer Full Client and Host prior to version 15.82 on Windows contain a TOCTOU race condition in the installer rollback mechanism. A local low-privileged attacker can replace rollback backup files stored in a user-writable temporary directory before they are restored by an elevated installer, resulting in privilege escalation to NT AUHORITY/SYSTEM. Exploitation requires successful timing of the race condition and a rollback during installation or update.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.3 High | CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H | TV |
Weaknesses
- CWE-367 Time-of-check time-of-use (TOCTOU) race condition
Affected Products
| Product | Versions |
|---|---|
Full ClientTeamViewer |
|
HostTeamViewer |
|
References
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