CVE-2026-7124 Totolink A8000RU CGI cstecgi.cgi setIpv6LanCfg os command injection
Remote attackers can execute arbitrary OS commands on Totolink A8000RU routers via the setIpv6LanCfg 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-2026-7124?
CVE-2026-7124 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 determined in Totolink A8000RU 7.1cu.643_b20200521. Affected by this vulnerability is the function setIpv6LanCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Executing a manipulation of the argument addrPrefixLen can lead to os command injection. The attack can be launched remotely. The exploit has been publicly disclosed and may be utilized.
Which versions are affected by CVE-2026-7124?
How do I fix CVE-2026-7124?
No fix has been published for CVE-2026-7124 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-2026-7124 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-7124 exists.
Sources
Also known as GHSA-5p3g-x7p5-6r8c.