OS Command Injection Vulnerability in Totolink A7100RU by Totolink
CVE-2026-6116

9.3CRITICAL

Key Information:

Vendor

Totolink
Status
A7100ru
Vendor
CVE Published:
12 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-6116?

A vulnerability has been identified in the Totolink A7100RU model, specifically affecting the setDiagnosisCfg function in the cgi-bin/cstecgi.cgi component. This security flaw enables the manipulation of the 'ip' argument, which can lead to OS command injection. As a result, an attacker is able to execute unauthorized commands on the affected system remotely. This vulnerability has been publicly disclosed and presents significant security risks for users of this device.

Affected Version(s)

A7100RU 7.4cu.2313_b20191024

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-2026-6116 - Proof of Concept

References

https://vuldb.com/vuln/356976
vdb-entrytechnical-description
https://vuldb.com/vuln/356976/cti
signaturepermissions-required
https://vuldb.com/submit/792249
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

LtzHust2 (VulDB User)
.