CVE-2026-18616
Received Received - Intake

Command Injection in GL-iNet GL-MT3000

Publication date: 2026-08-03

Last updated on: 2026-08-03

Assigner: VulDB

Description
A vulnerability was identified in GL-iNet GL-MT3000 up to 4.4.5. The impacted element is the function server.set_peer of the file /cgi-bin/glc of the component wg-server.so Native Plugin. The manipulation of the argument public_key leads to command injection. Remote exploitation of the attack is possible. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure and confirmed the existence of the vulnerability.

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Meta Information

Published
2026-08-03
Last Modified
2026-08-03
Generated
2026-08-04
AI Q&A
2026-08-03
EPSS Evaluated
N/A
NVD
CVE-2026-18616
EUVD
EUVD-2026-52414

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
gl-inet gl-mt3000 to 4.4.5 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-74 The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.
CWE-77 The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.

Attack-Flow Graph

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Executive Summary

This vulnerability is a command injection flaw in the GL-iNet GL-MT3000 router up to version 4.4.5. It exists in the server.set_peer function of the file /cgi-bin/glc within the wg-server.so Native Plugin. The issue allows manipulation of the public_key argument to execute arbitrary commands remotely.

Detection Guidance

This vulnerability involves command injection via the public_key argument in the server.set_peer function of GL-iNet GL-MT3000 devices running firmware up to 4.4.5. To detect it, check for unusual network traffic or commands involving the /cgi-bin/glc endpoint. Inspect logs for unexpected public_key values or shell commands executed on the device.

Impact Analysis

An attacker could exploit this to gain unauthorized access to the router, execute malicious commands, steal sensitive data, or disrupt network operations. Since the exploit is publicly available, the risk of real-world attacks is high.

Compliance Impact

This vulnerability could lead to unauthorized access to personal or sensitive data, violating GDPR and HIPAA requirements for data protection and confidentiality. Organizations using affected devices may face compliance violations and legal consequences.

Mitigation Strategies

Immediately update the GL-iNet GL-MT3000 firmware to the latest version beyond 4.4.5. Disable remote access to the /cgi-bin/glc endpoint if not required. Monitor network traffic for suspicious activity targeting this function. Consider isolating the device from critical networks until patched.

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