Time-of-check Time-of-use (TOCTOU) Race Condition in TeamViewer products - CVE-2026-92369

Vulnerability identifier: #VU152871

CSH Severity: Medium

CVSS v4: 7.1 [CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-92369

CWE-ID: CWE-367

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to escalate privileges.

The vulnerability exists due to a time-of-check time-of-use race condition in the Windows installer rollback mechanism when restoring rollback backup files. A local user can replace rollback backup files in a user-writable temporary directory to escalate privileges.

Exploitation requires successful timing of the race condition during a rollback in an installation or update.

TeamViewer Remote Full Client for Windows
TeamViewer Host for macOS
TeamViewer Full Client for macOS
TeamViewer Full Client for Linux
TeamViewer Host for Linux
TeamViewer Remote Host for Windows

Install security update from vendor's website.

TeamViewer Remote Full Client for Windows - addressed in versions 13.2.36230, 14.7.48855, 15.64.8, 15.82
TeamViewer Remote Host for Windows - addressed in versions 13.2.36230, 14.7.48855, 15.64.8, 15.82
TeamViewer Host for macOS - addressed in versions 13.2.153994, 14.7.48855, 15.82
TeamViewer Full Client for macOS - addressed in versions 13.2.153994, 14.7.48855, 15.82
TeamViewer Full Client for Linux - addressed in versions 13.2.153995, 14.7.48855, 15.82
TeamViewer Host for Linux - addressed in versions 13.2.153995, 14.7.48855, 15.82

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

• Multiple vulnerabilities in TeamViewer