CVE-2026-71943: DrayTek VigorSwitch Multiple Models OS Command Injection via setDevNet
Multiple DrayTek VigorSwitch models contain a command injection vulnerability in the setDevNet 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
Who can exploit this issue?
A remote attacker must have valid administrative credentials for the device's web management interface. The issue is therefore most relevant where administrative access is exposed to untrusted users or where administrator credentials may have been compromised.
What level of access could successful exploitation provide?
Successful exploitation allows execution of arbitrary commands with root privileges on the affected device. This can affect confidentiality, integrity, and availability of the switch.
Which inputs are involved in the vulnerable operation?
The vulnerability is associated with insufficient filtering of username and password fields in the setDevNet function before command execution. Crafted input in those fields can trigger the command injection.