CVE-2026-92369

Summary

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.

Affected Software

VendorProductVersion RangeStatus
TeamViewerFull Client15.0 < 15.82affected
TeamViewerFull Client15.64.0 (Legacy Windows 7 & 8) < 15.64.8 (Legacy Windows 7 & 8)affected
TeamViewerFull Client14.7.0 < 14.7.48855affected
TeamViewerFull Client13.2.0 < 13.2.36230affected
TeamViewerHost15.0 < 15.82affected
TeamViewerHost15.64.0 (Legacy Windows 7 & 8) < 15.64.8 (Legacy Windows 7 & 8)affected
TeamViewerHost14.7.0 < 14.7.48855affected
TeamViewerHost13.2.0 < 13.2.36230affected

Weaknesses

  • CWE-367: CWE-367 Time-of-check time-of-use (TOCTOU) race condition

References