Vulnerability in TeamViewer Full Client

[ Description ]Official 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.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund29 Sep 2026WID-SEC-2026-3670

  TeamViewer: Multiple vulnerabilities Translated from German

  CVE-2026-19743CVE-2026-92371CVE-2026-92370+2 more CVEs

[ References ]References

• www.teamviewer.com/en/resources/trust-center/security-bulletins/tv-2026-1010