Command Injection Vulnerability in GL.iNet AX1800 by GL.iNet
CVE-2026-18787

8.7HIGH

Key Information:

Vendor

Gl.inet

Status
Ax1800
Vendor
CVE Published:
4 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-18787?

A command injection vulnerability has been identified in the GL.iNet AX1800 device, specifically within the function remove_rule in the file /usr/share/gl-ngx/oui-rpc.lua related to the RPC Endpoint component. This vulnerability allows remote attackers to manipulate the args.id argument, potentially leading to the execution of arbitrary commands on the device. Given that exploits for this vulnerability are publicly available, it raises significant security concerns for users operating unpatched versions up to 4.8.3. Immediate attention to this issue is crucial to mitigate potential threats.

Affected Version(s)

AX1800 4.8.0

AX1800 4.8.1

AX1800 4.8.2

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-2026-18787 - Proof of Concept

References

https://vuldb.com/vuln/385788
vdb-entrytechnical-description
https://vuldb.com/vuln/385788/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-18787
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
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

misaki_ce (VulDB User)
VulDB CNA Team
.