Vulnerability · Published Feb 27, 2026 · Assigned by VulDB

CVE-2026-3301Totolink N300RH Web Management cstecgi.cgi setWebWlanIdx os command injection

Critical 9.8

In plain English

A critical-severity OS command injection in N300RH from Totolink. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 4.4% (higher than 91% of all known vulnerabilities).

Severity (CVSS 3.1)9.8Critical

Exploit odds (30 days)4.4%top 8.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

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.

Affected products (as reported)

Vendor	Product	Versions
Totolink	N300RH	6.1c.1353_B20190305

Weakness: CWE-78, CWE-77 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

References

VDB-348052 | Totolink N300RH Web Management cstecgi.cgi setWebWlanIdx os command injection vdb-entry, technical-description
VDB-348052 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
Submit #761297 | TOTOLINK N300RH_V4 V6.1c.1353_B20190305 Command Injection third-party-advisory
https://github.com/xyh4ck/iot_poc/blob/main/TOTOLINK/N300RHv4/01_setWebWlanIdx_RCE/README.md exploit
https://www.totolink.net/ product