CVE-2026-71923 DrayTek VigorSwitch Multiple Models OS Command Injection via auth_set
Remote attackers with admin credentials can execute arbitrary root commands on DrayTek VigorSwitch devices via the auth_set function.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-71923?
CVE-2026-71923 is a high-severity command injection vulnerability in DrayTek Corporation VigorSwitch FX2120, published on 24 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
Multiple DrayTek VigorSwitch models contain a command injection vulnerability in the auth_set function. The vulnerability is caused by insufficient filtering of the username and password fields before command execution. A remote attacker can trigger this vulnerability via crafted input to execute arbitrary commands with root privileges. Exploitation requires valid administrative credentials for the device's web management interface.
Weakness: CWE-78
Which versions are affected by CVE-2026-71923?
How do I fix CVE-2026-71923?
No fix has been published for CVE-2026-71923 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-2026-71923 being exploited?
There is no known exploitation of CVE-2026-71923 in the wild and no public exploit code.
Sources
Also known as GHSA-8qhg-cv9c-6cjp.