OS Command Injection Vulnerability in Totolink A8000RU Web Management Interface
CVE-2026-9455

9.3CRITICAL

Key Information:

Vendor

Totolink
Status
A8000ru
Vendor
CVE Published:
25 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-9455?

A vulnerability exists in the Totolink A8000RU model, specifically in the Web Management Interface's UploadOpenVpnCert function located in the file /cgi-bin/cstecgi.cgi. This flaw allows an attacker to manipulate the FileName argument, leading to os command injection. This weakens security measures and could enable remote exploitation. Given that the exploit has been publicly disclosed, users of the affected version are strongly advised to implement security updates to mitigate any risks associated with this vulnerability.

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-2026-9455 - Proof of Concept

References

https://vuldb.com/vuln/365436
vdb-entrytechnical-description
https://vuldb.com/vuln/365436/cti
signaturepermissions-required
https://vuldb.com/submit/813449
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)
.