CVE-2026-3301 CRITICAL

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

Vendor Totolink
Product N300RH
Weakness CWE-78
Published February 27, 2026
Last update February 27, 2026
View on NVD All CVEs

CVSS base score

9.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

February 27, 2026 CVE published
February 27, 2026 Record updated