CVE-2026-7139 Totolink A8000RU CGI cstecgi.cgi setWiFiAclRules os command injection
Remote attackers can execute arbitrary OS commands on Totolink A8000RU routers via the setWiFiAclRules 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-2026-7139?
CVE-2026-7139 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 flaw has been found in Totolink A8000RU 7.1cu.643_b20200521. This issue affects the function setWiFiAclRules of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. This manipulation of the argument mode causes os command injection. The attack is possible to be carried out remotely. The exploit has been published and may be used.
Which versions are affected by CVE-2026-7139?
How do I fix CVE-2026-7139?
No fix has been published for CVE-2026-7139 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-2026-7139 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-7139 exists.
Sources
Also known as GHSA-8q74-gjq9-5xcc.