CVE-2026-71922 DrayTek VigorSwitch Multiple Models Pre-Authentication NULL Pointer Dereference via setget.cgi
Remote attackers can crash DrayTek VigorSwitch devices via a crafted request to setget.cgi, causing denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-71922?
CVE-2026-71922 is a high-severity vulnerability in DrayTek Corporation VigorSwitch FX2120, published on 24 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Multiple DrayTek VigorSwitch models contain a pre-authentication null pointer dereference vulnerability in the setget.cgi interface. The vulnerability is caused by missing validation when the pass field is absent. A remote attacker can trigger this vulnerability via a crafted request to crash the service and cause a denial of service.
Weakness: CWE-476
Which versions are affected by CVE-2026-71922?
How do I fix CVE-2026-71922?
No fix has been published for CVE-2026-71922 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-71922 being exploited?
There is no known exploitation of CVE-2026-71922 in the wild and no public exploit code.
Sources
Also known as GHSA-ppwv-q25g-vjpx.