CVE-2025-41421 Privilege Escalation via Symbolic Link Spoofing in TeamViewer Client
Local attackers can escalate privileges and access sensitive data by exploiting symbolic link spoofing in the TeamViewer Windows client update mechanism.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-41421?
CVE-2025-41421 is a medium-severity vulnerability in TeamViewer Full Client, published on 1 Oct 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Improper handling of symbolic links in the TeamViewer Full Client and Host for Windows — in versions prior to 15.70 of TeamViewer Remote and Tensor — allows an attacker with local, unprivileged access to a device lacking adequate malware protection to escalate privileges by spoofing the update file path. This may result in unauthorized access to sensitive information.
Weakness: CWE-59
Which versions are affected by CVE-2025-41421?
How do I fix CVE-2025-41421?
No fix has been published for CVE-2025-41421 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-41421 being exploited?
There is no known exploitation of CVE-2025-41421 in the wild and no public exploit code.
Sources
Also known as GHSA-m856-89mj-r6pg.