What is CVE-2026-3301?

CVE-2026-3301 is a critical-severity vulnerability in Totolink N300rh, classified under OS Command Injection. CVSS score: 9.8/10. Published 2026-02-27.

How severe is CVE-2026-3301?

Critical severity. CVSS v3 base score is 9.8 out of 10.

RCE in Totolink N300rh

CVE-2026-3301

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…

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.009 (76.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). 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.

Affected products

Totolink N300rh — versions 6.1c.1353_B20190305

Weakness classification (CWE)

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)
github.com/xyh4ck/iot_poc/blob/main/TOTOLINK/N300RHv4/01_setWebWlanIdx_RCE/READ… (exploit)
www.totolink.net/ (product)

Frequently asked questions

What is CVE-2026-3301?: CVE-2026-3301 is a critical-severity vulnerability in Totolink N300rh, classified under OS Command Injection. CVSS score: 9.8/10. Published 2026-02-27.
How severe is CVE-2026-3301?: Critical severity. CVSS v3 base score is 9.8 out of 10.