What’s Vulnerable › Vulnerabilities

CVE-2026-12187: GL.iNet GL-MT3000 Online Firmware Upgrade one_click_upgrade command injection

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-14 · updated 2026-07-24
• Weakness: CWE-74

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.

Affected products

• GL.iNet GL-MT3000: 4.4.0, 4.4.1, 4.4.2, 4.4.3, 4.4.4, 4.4.5

References

• https://fw.gl-inet.com/firmware/mt3000/release/mt3000-4.8.1-0819-1755615825.tar
• https://github.com/StrTzz123/iot_vul/tree/main/GL-iNet/MT3000/4.4.5/upgrade_online_url
• https://vuldb.com/cve/CVE-2026-12187
• https://vuldb.com/submit/815654
• https://vuldb.com/vuln/370833
• https://vuldb.com/vuln/370833/cti

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