OS Command Injection Vulnerability in Totolink A8000RU Device
CVE-2026-7240

9.3CRITICAL

Key Information:

Vendor

Totolink
Status
A8000ru
Vendor
CVE Published:
28 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-7240?

A vulnerability exists within the Totolink A8000RU due to improper handling of user input in the setVpnAccountCfg function located in /cgi-bin/cstecgi.cgi. This weakness allows an attacker to execute arbitrary operating system commands via crafted requests. This command injection can be exploited remotely, posing significant risks to the device's security and integrity. Users are encouraged to review their configurations and update to mitigate the potential threat posed by this publicly disclosed exploit.

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-2026-7240 - Proof of Concept

References

https://vuldb.com/vuln/359847
vdb-entrytechnical-description
https://vuldb.com/vuln/359847/cti
signaturepermissions-required
https://vuldb.com/submit/802845
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)
.