CVE-2026-19743 Improper Limitation of a Pathname to a Restricted Directory (Path Traversal) in TeamViewer Desktop Clients
A local attacker can exploit path traversal in TeamViewer's IPC service to write arbitrary files as SYSTEM or root, achieving privilege escalation.
- 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-2026-19743?
CVE-2026-19743 is a high-severity path traversal vulnerability in TeamViewer Full Client, published on 29 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Improper path validation in the local IPC service of TeamViewer Full Client and Host on Windows, Linux, and macOS prior to version 15.82 allows a local authenticated user with low privileges to perform arbitrary file writes with elevated privileges (NT AUTHORITY/SYSTEM \ root). By sending crafted IPC commands to the local service daemon, an attacker could manipulate file paths, leading to local privilege escalation.
Weakness: CWE-22
Which versions are affected by CVE-2026-19743?
How do I fix CVE-2026-19743?
No fix has been published for CVE-2026-19743 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-19743 being exploited?
There is no known exploitation of CVE-2026-19743 in the wild and no public exploit code.
Sources
Also known as GHSA-xx8p-86ff-fc5j.