Command Injection Vulnerability in GL.iNet GL-MT3000 Router
CVE-2026-18601

9.3CRITICAL

Key Information:

Vendor

Gl.inet

Status
Gl-mt3000
Vendor
CVE Published:
3 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-18601?

A command injection vulnerability has been identified in the GL.iNet GL-MT3000 router, specifically affecting the ovpn-client.check_config function within the /cgi-bin/glc of the ovpn-client.so Native Plugin. By manipulating the argument 'filename', an attacker can exploit this vulnerability to execute arbitrary commands remotely. It is critical for users of affected versions up to 4.4.5 to secure their systems, as the exploit has been publicly disclosed, increasing the likelihood of attacks.

Affected Version(s)

GL-MT3000 4.4.0

GL-MT3000 4.4.1

GL-MT3000 4.4.2

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-2026-18601 - Proof of Concept

References

https://vuldb.com/vuln/385516
vdb-entrytechnical-description
https://vuldb.com/vuln/385516/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-18601
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

strforexc (VulDB User)
VulDB CNA Team
.