CVE-2026-12187

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.

CVSS v4.0

7.4 HIGHCVSS: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:X/V:X/RE:X/U:X

CVSS v3.1

8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0

9.0 HIGHAV:N/AC:L/Au:S/C:C/I:C/A:C

EPSS

1.94% chance of exploitation in the next 30 days, 79th percentile

Published

2026-06-14

Updated

2026-06-15

Proof-of-concept exploits (1)

• StrTzz123/iot_vul/tree/main/GL-iNet/MT3000/4.4.5/upgrade_online_url

References

• CVE Record
• NVD entry

Related

• CVE-2026-11406
• CVE-2026-11447
• CVE-2026-12186
• CVE-2026-18598
• CVE-2026-18599
• CVE-2026-18600