OS Command Injection in Totolink N300RH Web Management Interface
CVE-2026-9543

9.3CRITICAL

Key Information:

Vendor

Totolink
Status
N300rh
Vendor
CVE Published:
26 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-9543?

A vulnerability exists in the Totolink N300RH Web Management Interface related to the function setPasswordCfg within the cgi-bin/cstecgi.cgi file. This vulnerability allows for remote execution of OS commands due to improper handling of the admpass argument. Attackers can exploit this flaw to execute arbitrary commands, posing a significant security risk to devices running this version. Given the public disclosure of the exploit, users are advised to take immediate action to secure their systems.

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-2026-9543 - Proof of Concept

References

https://vuldb.com/vuln/365607
vdb-entrytechnical-description
https://vuldb.com/vuln/365607/cti
signaturepermissions-required
https://vuldb.com/submit/815068
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

a1ester (VulDB User)
.