OS Command Injection Vulnerability in Totolink N300RH Web Management Interface
CVE-2026-3301

9.3CRITICAL

Key Information:

Vendor

Totolink
Status
N300rh
Vendor
CVE Published:
27 February 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-3301?

A vulnerability has been identified in the web management interface of the Totolink N300RH model version 6.1c.1353_B20190305. This flaw arises from improper handling of the 'webWlanIdx' parameter in the 'setWebWlanIdx' function found in '/cgi-bin/cstecgi.cgi'. Remote attackers can exploit this oversight to execute arbitrary operating system commands on the affected device, posing a significant security risk. As the exploit details have been released publicly, organizations using this model are advised to take necessary precautions and update their systems.

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Affected Version(s)

N300RH 6.1c.1353_B20190305

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-3301 - Proof of Concept

References

https://vuldb.com/?id.348052
vdb-entrytechnical-description
https://vuldb.com/?ctiid.348052
signaturepermissions-required
https://vuldb.com/?submit.761297
third-party-advisory

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

xuanyu (VulDB User)
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