CVE-2026-5852 Totolink A7100RU CGI cstecgi.cgi setIptvCfg os command injection
Remote attackers can execute arbitrary OS commands on Totolink A7100RU routers via the setIptvCfg 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-2026-5852?
CVE-2026-5852 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 weakness has been identified in Totolink A7100RU 7.4cu.2313_b20191024. Affected is the function setIptvCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. This manipulation of the argument igmpVer causes os command injection. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks.
Which versions are affected by CVE-2026-5852?
How do I fix CVE-2026-5852?
No fix has been published for CVE-2026-5852 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-2026-5852 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-5852 exists.
Sources
Also known as GHSA-v7g8-5jcv-9p6p.