OS Command Injection Vulnerability in Totolink A8000RU Web Management Interface
CVE-2026-9458

9.3CRITICAL

Key Information:

Vendor

Totolink
Status
A8000ru
Vendor
CVE Published:
25 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-9458?

A vulnerability has been discovered in the Totolink A8000RU router, specifically within the Web Management Interface's setWanCfg function in the cgi-bin/cstecgi.cgi file. This flaw allows for OS command injection through manipulated arguments, enabling potential attackers to execute arbitrary commands on the affected device from a remote location. Given that the exploit details are publicly accessible, it poses a significant risk to users who do not apply necessary mitigations and updates.

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-2026-9458 - Proof of Concept

References

https://vuldb.com/vuln/365439
vdb-entrytechnical-description
https://vuldb.com/vuln/365439/cti
signaturepermissions-required
https://vuldb.com/submit/813457
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

LtzHust (VulDB User)
.