CVE-2026-19042 Command Injection in TeamViewer Desktop Client for Linux through Chat Link Handling
Remote attackers can execute arbitrary commands via malicious chat links in TeamViewer Linux clients, requiring user interaction to click the link.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-19042?
CVE-2026-19042 is a high-severity command injection vulnerability in TeamViewer Full Client, published on 26 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
A command injection vulnerability in TeamViewer Full Client and Host for Linux prior to version 15.81.5 allows a remote attacker to execute arbitrary commands in the context of the current user via a specially crafted URL sent through the out-of-session chat feature. Exploitation requires user interaction by clicking the malicious link.
Weakness: CWE-78
Which versions are affected by CVE-2026-19042?
How do I fix CVE-2026-19042?
No fix has been published for CVE-2026-19042 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-19042 being exploited?
There is no known exploitation of CVE-2026-19042 in the wild and no public exploit code.
Sources
Also known as GHSA-hv9x-3jwv-hvm4.