CVE-2026-92369
Time-of-check Time-of-use (TOCTOU) Race Condition in TeamViewer Windows Installer Rollback Mechanism Leads to Local Privilege Escalation
CVSS Score
7.3
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-367 |
| Vendor | teamviewer |
| Product | full client |
| Published | Sep 29, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
TeamViewer / Full Client
15.0 < 15.82 15.64.0 (Legacy Windows 7 & 8) < 15.64.8 (Legacy Windows 7 & 8) 14.7.0 < 14.7.48855 13.2.0 < 13.2.36230
TeamViewer / Host
15.0 < 15.82 15.64.0 (Legacy Windows 7 & 8) < 15.64.8 (Legacy Windows 7 & 8) 14.7.0 < 14.7.48855 13.2.0 < 13.2.36230
References
Credits
We thank Romain Igounet and Hugo Leclercq for the discovery and responsible disclosure.