CVE-2026-12187
GL.iNet GL-MT3000 Online Firmware Upgrade one_click_upgrade command injection
- State
- Published
- Severity
- 8.7 High
- Published
- Jun 14, 2026
- Updated
- Jun 15, 2026
- Reserved
- Jun 14, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.7 High | 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 | VulDB |
| 3.1 | 8.8 High | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C | VulDB |
| 3.0 | 8.8 High | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C | VulDB |
| 2.0 | 9.0 High | AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:OF/RC:C | VulDB |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
GL-MT3000GL.iNet |
|
References
- VDB-370833 | GL.iNet GL-MT3000 Online Firmware Upgrade one_click_upgrade command injectionvdb-entry
- VDB-370833 | CTI Indicators (IOB, IOC, TTP, IOA)signaturepermissions-required
- CVE-2026-12187 | CVE Analysis and Reportthird-party-advisory
- Submit #815654 | GL.iNet GL-MT3000 4.4.5 Command Injectionthird-party-advisory
- https://github.com/StrTzz123/iot_vul/tree/main/GL-iNet/MT3000/4.4.5/upgrade_online_urlexploitpatch
- https://fw.gl-inet.com/firmware/mt3000/release/mt3000-4.8.1-0819-1755615825.tarpatch
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