CVE-2026-6156 Totolink A7100RU CGI cstecgi.cgi setIpQosRules os command injection
Remote attackers can execute arbitrary OS commands on Totolink A7100RU routers via the setIpQosRules CGI handler.
- 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-2026-6156?
CVE-2026-6156 is a critical command injection vulnerability in Totolink A7100RU, published on 13 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A security vulnerability has been detected in Totolink A7100RU 7.4cu.2313_b20191024. This affects the function setIpQosRules of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument Comment leads to os command injection. Remote exploitation of the attack is possible. The exploit has been disclosed publicly and may be used.
Which versions are affected by CVE-2026-6156?
How do I fix CVE-2026-6156?
No fix has been published for CVE-2026-6156 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-2026-6156 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-6156 exists.
Sources
Also known as GHSA-5m5h-8mf7-m28q.