OS Command Injection Vulnerability in Totolink A8000RU Web Management Interface
CVE-2026-9384

9.3CRITICAL

Key Information:

Vendor

Totolink
Status
A8000ru
Vendor
CVE Published:
24 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-9384?

A vulnerability has been identified in the Totolink A8000RU device, specifically within the web management interface. This security flaw, located in the setDiagnosisCfg function of the cstecgi.cgi file, allows for OS command injection through the manipulation of the IP argument. Attackers can exploit this issue remotely, potentially leading to unauthorized command execution on the affected system. The exploit has been disclosed publicly and poses a risk to users of the device.

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-2026-9384 - Proof of Concept

References

https://vuldb.com/vuln/365347
vdb-entrytechnical-description
https://vuldb.com/vuln/365347/cti
signaturepermissions-required
https://vuldb.com/submit/813429
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

LtzHuster (VulDB User)
.