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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.

PUBLISHED Reserved 2026-06-14 | Published 2026-06-14 | Updated 2026-06-14 | Assigner VulDB




HIGH: 8.7CVSS: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
HIGH: 8.8CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
HIGH: 8.8CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
9.0AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:OF/RC:C

Problem types

Command Injection

Injection

Product status

4.4.0
affected

4.4.1
affected

4.4.2
affected

4.4.3
affected

4.4.4
affected

4.4.5
affected

4.7
unaffected

Timeline

2026-06-14:Advisory disclosed
2026-06-14:VulDB entry created
2026-06-14:VulDB entry last update

Credits

strforexc (VulDB User) reporter

VulDB CNA Team coordinator

References

vuldb.com/vuln/370833 (VDB-370833 | GL.iNet GL-MT3000 Online Firmware Upgrade one_click_upgrade command injection) vdb-entry

vuldb.com/vuln/370833/cti (VDB-370833 | CTI Indicators (IOB, IOC, TTP, IOA)) signature permissions-required

vuldb.com/cve/CVE-2026-12187 (CVE-2026-12187 | CVE Analysis and Report) third-party-advisory

vuldb.com/submit/815654 (Submit #815654 | GL.iNet GL-MT3000 4.4.5 Command Injection) third-party-advisory

github.com/...e/main/GL-iNet/MT3000/4.4.5/upgrade_online_url exploit patch

fw.gl-inet.com/...0/release/mt3000-4.8.1-0819-1755615825.tar patch

cve.org (CVE-2026-12187)

nvd.nist.gov (CVE-2026-12187)

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