CVE-2026-12187

High

Description

A security vulnerability has been detected in GL.iNet GL-MT3000 up to 4.4.5. Affected by this vulnerability is an unknown functionality of the file /usr/bin/one_click_upgrade of the component Online Firmware Upgrade Handler. Such manipulation leads to command injection. The attack can be launched remotely. The exploit has been disclosed publicly and may be used. Upgrading to version 4.7 addresses this issue. Upgrading the affected component is advised. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

SeverityHigh
CVSS8.8
Exploit probability—
ProductGl-inet Gl-mt3000 Firmware
PublishedJun 14, 2026
First seenJun 14, 2026

How to fix

Affected products

ProductAffected versionsFixed in
gl-inet gl-mt3000_firmware4.4.0, 4.4.1, 4.4.2, 4.4.3, 4.4.4, 4.4.5—

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CVE-2026-12187 · Gl-inet Gl-mt3000 Firmware · Dark Radar