CVE-2026-9404 Totolink A8000RU Web Management cstecgi.cgi setDdnsCfg os command injection
Remote attackers can execute arbitrary OS commands via the setDdnsCfg function in the Totolink A8000RU web management interface.
- 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-2026-9404?
CVE-2026-9404 is a critical command injection vulnerability in Totolink A8000RU, published on 24 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability was identified in Totolink A8000RU 7.1cu.643_b20200521. This affects the function setDdnsCfg of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. Such manipulation of the argument provider leads to os command injection. The attack may be launched remotely. The exploit is publicly available and might be used.
Which versions are affected by CVE-2026-9404?
How do I fix CVE-2026-9404?
No fix has been published for CVE-2026-9404 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-2026-9404 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-9404 exists.
Sources
Also known as GHSA-7vm6-8rjp-xqmw.