CVE-2026-7155 Totolink A8000RU CGI cstecgi.cgi setLoginPasswordCfg os command injection
Remote attackers can execute arbitrary OS commands on Totolink A8000RU routers via the setLoginPasswordCfg 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-2026-7155?
CVE-2026-7155 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 security vulnerability has been detected in Totolink A8000RU 7.1cu.643_b20200521. This impacts the function setLoginPasswordCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument admpass leads to os command injection. The attack may be initiated remotely. The exploit has been disclosed publicly and may be used.
Which versions are affected by CVE-2026-7155?
How do I fix CVE-2026-7155?
No fix has been published for CVE-2026-7155 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-2026-7155 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-7155 exists.
Sources
Also known as GHSA-hg4x-6g5c-368c.