Link following in TeamViewer Remote Full Client for Windows and TeamViewer Remote Host for Windows - CVE-2025-41421
Published: October 3, 2025
Vulnerability identifier: #VU116444
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-41421
CWE-ID: CWE-59
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to an insecure link following issue. A local user can create a specially crafted symbolic link to a critical file on the system and overwrite it with privileges of the application.
Affected software
TeamViewer Remote Full Client for Windows
TeamViewer Remote Host for Windows
TeamViewer Remote Host for Windows
How to mitigate CVE-2025-41421
Install updates from vendor's website.
TeamViewer Remote Full Client for Windows - update to 15.70
TeamViewer Remote Host for Windows - update to 15.70
TeamViewer Remote Host for Windows - update to 15.70