CVE-2026-71923: DrayTek VigorSwitch Multiple Models OS Command Injection via auth_set
Multiple DrayTek VigorSwitch models contain a command injection vulnerability in the authset 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.
Affected Software
Event History
Frequently Asked Questions
What access does an attacker need to exploit this issue?
The attacker must have valid administrative credentials for the device's web management interface. No user interaction is required once those credentials are available.
What level of access could successful exploitation provide?
A successful attacker can execute arbitrary operating-system commands with root privileges on the affected switch.
Which inputs are involved in the vulnerable operation?
The issue is caused by insufficient filtering of username and password fields in the auth_set function before command execution.