CVE-2026-92369: TeamViewer Full Client

High severity, CVSS 7.3. EPSS: 0.1% chance of exploitation in the next 30 days.

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 products

• TeamViewer Full Client: from 15.0, before 15.82 (fixed in 15.82); from 14.7.0, before 14.7.48855 (fixed in 14.7.48855); from 13.2.0, before 13.2.36230 (fixed in 13.2.36230)
• TeamViewer Host: from 15.0, before 15.82 (fixed in 15.82); from 14.7.0, before 14.7.48855 (fixed in 14.7.48855); from 13.2.0, before 13.2.36230 (fixed in 13.2.36230)

Published 2026-09-29. Last modified 2026-09-30.