CVE-2026-3301: Totolink n300rh Firmware

Critical severity, CVSS 9.8. EPSS: 4.5% chance of exploitation in the next 30 days.

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

• Totolink n300rh Firmware: version 6.1c.1349_b20181018 only; version 6.1c.1353_b20190305 only

Published 2026-02-27. Last modified 2026-06-17.