CVE-2026-7720 Totolink WA300 POST Request cstecgi.cgi setLanguageCfg command injection
Remote attackers can execute arbitrary commands on Totolink WA300 routers via the setLanguageCfg function in cstecgi.cgi.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-7720?
CVE-2026-7720 is a medium-severity command injection vulnerability in Totolink WA300, published on 4 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A weakness has been identified in Totolink WA300 5.2cu.7112_B20190227. The impacted element is the function setLanguageCfg of the file /cgi-bin/cstecgi.cgi of the component POST Request Handler. This manipulation of the argument langType causes command injection. Remote exploitation of the attack is possible. The exploit has been made available to the public and could be used for attacks.
Which versions are affected by CVE-2026-7720?
How do I fix CVE-2026-7720?
No fix has been published for CVE-2026-7720 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-2026-7720 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-7720 exists.
Sources
Also known as GHSA-h38g-3gh9-c2c8.