CVE-2026-7138 Totolink A8000RU CGI cstecgi.cgi setNtpCfg os command injection
Remote attackers can execute arbitrary OS commands via the tz argument in the setNtpCfg function of Totolink A8000RU routers.
- 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-2026-7138?
CVE-2026-7138 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 vulnerability was detected in Totolink A8000RU 7.1cu.643_b20200521. This vulnerability affects the function setNtpCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument tz results in os command injection. The attack can be executed remotely. The exploit is now public and may be used.
Which versions are affected by CVE-2026-7138?
How do I fix CVE-2026-7138?
No fix has been published for CVE-2026-7138 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-2026-7138 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-7138 exists.
Sources
Also known as GHSA-2pj9-259f-2qvm.