CVE-2026-3301 Totolink N300RH Web Management cstecgi.cgi setWebWlanIdx os command injection
Remote attackers can execute arbitrary OS commands via the webWlanIdx parameter in the Totolink N300RH 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-2026-3301?
CVE-2026-3301 is a critical command injection vulnerability in Totolink N300RH, published on 27 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A security flaw has been discovered in Totolink N300RH 6.1c.1353_B20190305. Affected by this vulnerability is the function setWebWlanIdx of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. Performing a manipulation of the argument webWlanIdx results in os command injection. The attack can be initiated remotely. The exploit has been released to the public and may be used for attacks.
Which versions are affected by CVE-2026-3301?
It affects 1 product.
Products include Totolink N300rh Firmware.
How do I fix CVE-2026-3301?
No fix has been published for CVE-2026-3301 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-2026-3301 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-3301 exists.
Other vulnerabilities in Totolink N300RH
- CVE-2025-6400 TOTOLINK N300RH HTTP POST Message formPortFw buffer overflow
- CVE-2026-3696 Totolink N300RH CGI cstecgi.cgi setWiFiWpsConfig os command injection
- CVE-2025-4849 TOTOLINK N300RH cstecgi.cgi CloudACMunualUpdateUserdata command injection
- CVE-2025-4850 TOTOLINK N300RH cstecgi.cgi setUnloadUserData command injection
- CVE-2025-4851 TOTOLINK N300RH cstecgi.cgi setUploadUserData command injection
Sources
Also known as GHSA-jppp-pmhm-3cp9.