CVE-2026-12187

GL.iNet GL-MT3000 Online Firmware Upgrade one_click_upgrade command injection

HIGH
8.8
CVSS Score
Published: June 14, 2026 at 10:00 PM UTC
Updated: July 24, 2026 at 12:10 PM UTC
2 products affected across 1 vendorGl MT3000 FirmwareGL-MT3000

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Severity
HIGH8.8
Exploit prediction
EPSS 2%
SSVC
PoC

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Vendor states this is fixed in 4.7 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (6)

VDB Entry
Source: cverecord
https://vuldb.com/vuln/370833
SignaturePermissions Required
Source: cverecord
https://vuldb.com/vuln/370833/cti
Third Party Advisory
Source: cverecord
https://vuldb.com/cve/CVE-2026-12187
Third Party Advisory
Source: cverecord
https://vuldb.com/submit/815654

SSVC — Action Prioritization

SSVCPoCNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGHVulDB
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-77CWE-74

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