Executive brief
DrayTek VigorSwitch is a network switch used to manage and route data across enterprise networks. A command injection vulnerability in the device's web management interface allows an authenticated administrator to execute arbitrary system commands with root privileges by sending specially crafted usernames or passwords. This could enable a malicious insider or compromised admin account to take complete control of the network infrastructure.
Technical details
The vulnerability is an OS command injection (CWE-78) in the auth_set function of the VigorSwitch mainfunction.cgi component, caused by insufficient input validation on username and password fields before command execution. The attack requires valid administrative credentials and network access to the device's web management interface. A successful exploit allows an attacker to execute arbitrary commands with root privileges on the affected switch. DrayTek has released firmware patches for all affected models; administrators should upgrade to the patched versions immediately.
Affected products
- DrayTek VigorSwitch G2540xs < 3.9.10
- DrayTek VigorSwitch P2540xs < 3.9.10
- DrayTek VigorSwitch FX2120 < 3.9.10
- DrayTek VigorSwitch G2282x < 2.10.6
- DrayTek VigorSwitch P2282x < 2.10.6
- DrayTek VigorSwitch Q2300x < 2.10.7
- DrayTek VigorSwitch PQ2300xb < 2.10.7
- DrayTek VigorSwitch G2542x < 3.10.6
- DrayTek VigorSwitch P2542x < 3.10.6
- DrayTek VigorSwitch P2542xh < 3.10.6
- DrayTek VigorSwitch PX2060 < 2.9.10
- DrayTek VigorSwitch G1280 < 2.9.10
- DrayTek VigorSwitch P1280 < 2.9.10
- DrayTek VigorSwitch P1281x < 2.9.10
- DrayTek VigorSwitch G1282 < 2.9.10
- DrayTek VigorSwitch P1282 < 2.9.10
- DrayTek VigorSwitch G2121 < 2.9.10
- DrayTek VigorSwitch P2121 < 2.9.10
- DrayTek VigorSwitch PQ2121x < 2.9.10
- DrayTek VigorSwitch Q2121x < 2.9.10
- DrayTek VigorSwitch G2280x < 2.9.10
- DrayTek VigorSwitch P2280x < 2.9.10
- DrayTek VigorSwitch Q2200x < 2.9.10
- DrayTek VigorSwitch PQ2200xb < 2.9.10
- DrayTek VigorSwitch G2100 < 2.9.10
- DrayTek VigorSwitch P2100 < 2.9.10
- DrayTek VigorSwitch G2540x < 2.9.10
- DrayTek VigorSwitch P2540x < 2.9.10
Timeline
- 2026-08-24: disclosed
- 2026-08-24: patched: Firmware patches released for all affected models