CVE-2026-5975 Totolink A7100RU CGI cstecgi.cgi setDmzCfg os command injection
Remote attackers can execute arbitrary OS commands on Totolink A7100RU routers via the setDmzCfg function in cstecgi.cgi.
- 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-2026-5975?
CVE-2026-5975 is a critical command injection vulnerability in Totolink A7100RU, published on 9 Apr 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 A7100RU 7.4cu.2313_b20191024. The impacted element is the function setDmzCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Such manipulation of the argument wanIdx leads to os command injection. The attack may be performed from remote. The exploit is publicly available and might be used.
Which versions are affected by CVE-2026-5975?
How do I fix CVE-2026-5975?
No fix has been published for CVE-2026-5975 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-2026-5975 being exploited?
There is no known exploitation of CVE-2026-5975 in the wild and no public exploit code.
Sources
Also known as GHSA-v89g-prph-7892.