OS Command Injection Vulnerability in Totolink Router Firmware
CVE-2026-6113

9.3CRITICAL

Key Information:

Vendor

Totolink
Status
A7100ru
Vendor
CVE Published:
12 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-6113?

A security vulnerability has been discovered in the Totolink A7100RU router's firmware, specifically within the CGI handler component. The vulnerability arises from improper handling of the 'ttyEnable' argument in the 'setTtyServiceCfg' function located in the /cgi-bin/cstecgi.cgi file. This flaw allows attackers to execute arbitrary OS commands remotely, leading to potential system compromise. The vulnerability has been publicly disclosed, underscoring the importance of prompt updates to secure the impacted devices.

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-2026-6113 - Proof of Concept

References

https://vuldb.com/vuln/356973
vdb-entrytechnical-description
https://vuldb.com/vuln/356973/cti
signaturepermissions-required
https://vuldb.com/submit/792246
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)
.