OS Command Injection Vulnerability in Totolink A8000RU by Totolink
CVE-2026-7242

9.3CRITICAL

Key Information:

Vendor

Totolink
Status
A8000ru
Vendor
CVE Published:
28 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-7242?

A serious OS command injection vulnerability exists in the Totolink A8000RU router, specifically in the function setOpenVpnClientCfg within the CGI Handler at /cgi-bin/cstecgi.cgi. This flaw allows an attacker to exploit a manipulation of the 'enabled' argument, leading to potential remote code execution. The vulnerability has been publicly documented and poses a significant risk to the device's security, making it imperative for users to apply necessary patches and enhance their network defenses.

Affected Version(s)

A8000RU 7.1cu.643_b20200521

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-2026-7242 - Proof of Concept

References

https://vuldb.com/vuln/359849
vdb-entrytechnical-description
https://vuldb.com/vuln/359849/cti
signaturepermissions-required
https://vuldb.com/submit/803265
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)
.