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CVE-2026-18787: Command Injection in GL.iNet AX1800

0
High
VulnerabilityCVE-2026-18787cvecve-2026-18787
Published: 08/04/2026 (08/04/2026, 17:00:09 UTC)
Source: CVE Database V5
Vendor/Project: GL.iNet
Product: AX1800

Description

CVE-2026-18787 is a command injection vulnerability in the GL.iNet AX1800 router firmware up to version 4.8.3. It affects the remove_rule function in the /usr/share/gl-ngx/oui-rpc.lua file within the RPC Endpoint component. The vulnerability allows remote attackers to manipulate the args.id argument to execute arbitrary commands. Exploit code is publicly available, but no known active exploitation has been reported. The vendor was notified early, but no official patch or remediation has been confirmed yet.

CVSS v4.0

Score 8.7high

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
Low
User Interaction
None
Vuln. Confidentiality
High
Vuln. Integrity
High
Vuln. Availability
High
Subsq. Confidentiality
None
Subsq. Integrity
None
Subsq. Availability
None
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P

Affected software

GL.iNet

AX1800

Affected versions
=4.8.0=4.8.1=4.8.2=4.8.3

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 08/11/2026, 18:16:19 UTC

Technical Analysis

This vulnerability involves a command injection flaw in the remove_rule function of the /usr/share/gl-ngx/oui-rpc.lua file in GL.iNet AX1800 devices running firmware versions up to 4.8.3. Remote attackers can exploit improper handling of the args.id argument to execute arbitrary commands on the device. The vulnerability is remotely exploitable without user interaction and has a high CVSS 4.0 base score of 8.7. Although exploit code is publicly available, there is no confirmation of active exploitation in the wild. The vendor was contacted early about the issue, but no official fix or patch has been documented in the provided data.

Potential Impact

Successful exploitation of this vulnerability could allow remote attackers to execute arbitrary commands on affected GL.iNet AX1800 devices, potentially leading to full system compromise. This could result in unauthorized control over the device, disruption of network services, or further attacks within the network environment. The high CVSS score reflects the critical nature of remote command injection with high impact on confidentiality, integrity, and availability.

Mitigation Recommendations

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or patch has been documented, users should monitor GL.iNet communications for updates. Until a patch is available, restricting remote access to the device's management interfaces and applying network-level controls to limit exposure may reduce risk.

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Technical Details

Data Version
5.2
Assigner Short Name
VulDB
Date Reserved
2026-08-04T08:33:00.136Z
Cvss Version
4.0
State
PUBLISHED

Threat ID: 6a721d52bf8831d53928c5ea

Added to database: 08/04/2026, 17:11:46 UTC

Last enriched: 08/11/2026, 18:16:19 UTC

Last updated: 09/18/2026, 02:30:17 UTC

Views: 36

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