CVE-2026-11449
Deferred Deferred - Pending Action

Command Injection in GL.iNet GL-MT3000

Publication date: 2026-06-07

Last updated on: 2026-06-09

Assigner: VulDB

Description
A security vulnerability has been detected in GL.iNet GL-MT3000 4.4.5. The impacted element is the function rpc_sys of the file /cgi-bin/luci/rpc of the component LuCI JSON-RPC Interface. Such manipulation leads to command injection. The attack may be performed from remote. Upgrading to version 4.8.1 is sufficient to resolve this issue. Upgrading the affected component is advised. The vendor confirms: "The issue discovered by the vulnerability researcher on older firmware versions(4.4.5) has actually been fixed and mitigated in the new version. According to the latest firmware fixes, by default, firmware versions after 4.7.13 do not install LuCI, so this vulnerability cannot be exploited."

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Meta Information

Published
2026-06-07
Last Modified
2026-06-09
Generated
2026-06-28
AI Q&A
2026-06-07
EPSS Evaluated
2026-06-26
NVD
CVE-2026-11449
EUVD
EUVD-2026-34980

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
gl.inet gl-mt3000 4.4.5
gl.inet gl-mt3000 4.8.1

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
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.
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.

Attack-Flow Graph

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Executive Summary

CVE-2026-11449 is an authenticated remote code execution vulnerability affecting GL.iNet GL-MT3000 devices running firmware version 4.4.5. It exists in the LuCI JSON-RPC interface, specifically in the rpc_sys function of the /cgi-bin/luci/rpc component. The vulnerability arises due to improper access controls and lack of input sanitization, allowing an attacker with root credentials to execute arbitrary commands on the device.

  • The nginx server exposes the legacy LuCI CGI path without proper restrictions.
  • The authentication endpoint allows login without requiring a prior session.
  • The rpc_sys() function exposes all luci.sys module functions without a whitelist.
  • The luci.sys.exec function directly executes commands without input sanitization.
  • An attacker can authenticate with root credentials, obtain a session ID, and send commands that execute as root on the device.
Impact Analysis

This vulnerability allows an attacker who knows the root password to remotely execute arbitrary commands on the affected device with root privileges. This can lead to full compromise of the device, including unauthorized access, data theft, manipulation of device settings, installation of malicious software, or disruption of device functionality.

  • Remote code execution as root user.
  • Potential unauthorized access to sensitive data stored on the device.
  • Ability to alter device configuration or firmware.
  • Possible denial of service or device takeover.
Detection Guidance

This vulnerability can be detected by attempting to authenticate and execute commands via the LuCI JSON-RPC interface on the affected GL.iNet GL-MT3000 device running firmware version 4.4.5.

  • Use a POST request to /cgi-bin/luci/rpc/auth with root credentials to obtain a session ID.
  • Send a POST request to /cgi-bin/luci/rpc/sys?auth=<sid> with the method "exec" and arbitrary command parameters to test if command execution is possible.
  • A successful command execution returning output in the JSON-RPC response indicates the presence of the vulnerability.

A proof-of-concept Python script exists that automates this process by authenticating and executing arbitrary commands on the device.

Mitigation Strategies

The immediate and recommended mitigation step is to upgrade the GL.iNet GL-MT3000 device firmware to version 4.8.1 or later.

Firmware versions after 4.7.13 do not install the LuCI component by default, which effectively prevents exploitation of this vulnerability.

Upgrading the affected component removes the vulnerable LuCI JSON-RPC interface and fixes the command injection issue.

Compliance Impact

The provided information does not specify any direct impact of this vulnerability on compliance with common standards and regulations such as GDPR or HIPAA.

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