Quick answers
- Is CVE-2026-71929 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-71929 being exploited in the wild.
- How severe is CVE-2026-71929?
- High severity, with a CVSS score of 7.2, published 24 August 2026.
- Which products and versions are affected?
- DrayTek VigorSwitch FX2120 < 3.9.10; DrayTek VigorSwitch G1280 < 2.9.10; DrayTek VigorSwitch G1282 < 2.9.10; DrayTek VigorSwitch G2100 < 2.9.10; and 24 more.
- Is there a fix for CVE-2026-71929?
- A patch was published on 2026-08-24: Firmware updates released for all affected models Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-71929 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-71929?
- Check whether you run DrayTek VigorSwitch FX2120, DrayTek VigorSwitch G1280, DrayTek VigorSwitch G1282 or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The vulnerability is an OS command injection (CWE-78) in the setDevProto function of the VigorSwitch mainfunction.cgi component, caused by insufficient input filtering of username and password fields before command execution. Attack vector is network-based and requires valid administrative credentials and authentication to the device's web management interface. A successful exploit allows an attacker to execute arbitrary commands with root privileges on the affected appliance. Patches have been released by DrayTek with fixed firmware versions for all affected models (ranging from 2.9.10 to 3.10.6 depending on model).
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 updates released for all affected models