CVE-2026-5679 Totolink A3300R cstecgi.cgi vsetTr069Cfg os command injection
Attackers can execute arbitrary OS commands via the stun_pass parameter in the TR-069 configuration handler of Totolink A3300R routers.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-5679?
CVE-2026-5679 is a medium-severity command injection vulnerability in Totolink A3300R, published on 6 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A security vulnerability has been detected in Totolink A3300R 17.0.0cu.557_B20221024. The impacted element is the function vsetTr069Cfg of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument stun_pass leads to os command injection. The exploit has been disclosed publicly and may be used.
Which versions are affected by CVE-2026-5679?
How do I fix CVE-2026-5679?
No fix has been published for CVE-2026-5679 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-5679 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-5679 exists.
Sources
Also known as GHSA-cmq3-f6cg-p3p7.