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

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CRITICAL

Totolink N300RH Web Management cstecgi.cgi setWebWlanIdx os command injection

Published Feb 27, 2026

9.3

CRITICAL

CVSS 4.0

EPSS 4.51%

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

Vendor TOTOLINK Product N300RH Default
n/a
- Version
  6.1c.1353_B20190305
  Status
  affected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

TOTOLINK

N300RH

n/a

Version	Status	Constraints
6.1c.1353_B20190305	affected	-

Remediation

No remediation recorded yet.

Weaknesses (2)

CWE-77

CWE-78

OS Command Injection

References (6)

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-9003
Advisory
https://github.com/xyh4ck/iot_poc/blob/main/TOTOLINK/N300RHv4/01_setWebWlanIdx_RCE/README.md
exploitThird Party Advisory
https://vuldb.com/?ctiid.348052
signaturepermissions-requiredPermissions RequiredVDB Entry
https://vuldb.com/?id.348052
vdb-entrytechnical-descriptionThird Party AdvisoryVDB Entry
https://vuldb.com/?submit.761297
third-party-advisoryThird Party AdvisoryVDB Entry
https://www.totolink.net/
product

Link	Providers	Tags
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-9003		Advisory
https://github.com/xyh4ck/iot_poc/blob/main/TOTOLINK/N300RHv4/01_setWebWlanIdx_RCE/README.md		exploitThird Party Advisory
https://vuldb.com/?ctiid.348052		signaturepermissions-requiredPermissions RequiredVDB Entry
https://vuldb.com/?id.348052		vdb-entrytechnical-descriptionThird Party AdvisoryVDB Entry
https://vuldb.com/?submit.761297		third-party-advisoryThird Party AdvisoryVDB Entry
https://www.totolink.net/		product