Vulnerability record · CVE-2026-12187 · published 14 June 2026

CVE-2026-12187: Injection vulnerability

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.

7.4 CVSS 4.0 High EPSS 1.9% · top 20.7% CWE-74 · InjectionCWE-77 · Command injection Deferred

7.4CVSS 4.0 base score, v2 9.0

1.9%EPSS exploitation probability, 30 days

NoNot in CISA KEV

0Affected product versions listed by NVD

6References

24 Jul 2026Last modified by NVD

Description

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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

Link	Tags
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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Source: NIST National Vulnerability Database (record CVE-2026-12187), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.