CVE-2026-9543 Totolink N300RH Web Management cstecgi.cgi setPasswordCfg os command injection
Remote attackers can execute arbitrary OS commands via the admpass parameter in the web management interface of Totolink N300RH routers.
- 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-2026-9543?
CVE-2026-9543 is a critical command injection vulnerability in Totolink N300RH, published on 26 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability has been found in Totolink N300RH 6.1c.1353_B20190305. Affected is the function setPasswordCfg of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. Such manipulation of the argument admpass leads to os command injection. The attack can be executed remotely. The exploit has been disclosed to the public and may be used.
Which versions are affected by CVE-2026-9543?
How do I fix CVE-2026-9543?
No fix has been published for CVE-2026-9543 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-2026-9543 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-9543 exists.
Sources
Also known as GHSA-85g8-3qwj-fmpv.