High 8.8Published Jun 14, 2026

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

Updated under an hour ago (Oct 28, 2026, 1:10 AM ET)

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It affects GL.iNet GL-MT3000. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for GL.iNet GL-MT3000

Exploited in the last 30 days

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: 8.8 HIGH (v3.1, CNA)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
Weakness (CWE): CWE-77, CWE-74
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulDB
NVD analysis: Deferred
Record last updated: Jun 15, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

GL.iNet GL-MT3000 gl-inet:gl-mt3000_firmware	4.4.0; 4.4.1; 4.4.2; 4.4.3; 4.4.4; 4.4.5; 4.7 not affected	CNA record

References

References

https://vuldb.com/vuln/370833	vdb-entry
https://vuldb.com/vuln/370833/cti	signature, permissions-required
https://vuldb.com/cve/CVE-2026-12187	third-party-advisory
https://vuldb.com/submit/815654	third-party-advisory
https://github.com/StrTzz123/iot_vul/tree/main/GL-iNet/MT3000/4.4.5/upgrade_online_url	exploit, patch
https://fw.gl-inet.com/firmware/mt3000/release/mt3000-4.8.1-0819-1755615825.tar	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.