CVE-2026-7136 Totolink A8000RU CGI cstecgi.cgi setDmzCfg os command injection
Remote attackers can execute arbitrary OS commands on Totolink A8000RU routers via the setDmzCfg 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-2026-7136?
CVE-2026-7136 is a critical command injection vulnerability in Totolink A8000RU, published on 27 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A weakness has been identified in Totolink A8000RU 7.1cu.643_b20200521. Affected by this issue is the function setDmzCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Executing a manipulation of the argument wanIdx can lead to os command injection. The attack may be launched remotely. The exploit has been made available to the public and could be used for attacks.
Which versions are affected by CVE-2026-7136?
How do I fix CVE-2026-7136?
No fix has been published for CVE-2026-7136 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-2026-7136 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-7136 exists.
Sources
Also known as GHSA-6mvh-mq55-p77g.