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Vulnerability record · public intelligence
CVE-2026-12187
HIGH

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

Published Jun 14, 2026 · Updated Nov 3, 2026

Severity · CVSSHIGH · Not scored
Known exploitationNot listed
EPSS / likelihood1.94%
QFinch risk scoreNot available

Original summary

Normalized public record · Updated Nov 3, 2026

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

Publisher and source text is retained separately from QFinch interpretation.

QFinch assessment

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.

Evidence: public source records

Affected products

Affected scope reported by the available public evidence
Affected package, product or rangeFix status
Consult the referenced vendor advisory for affected versions.Consult source advisory

Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.

Remediation

Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.

  1. Confirm the affected product and reachable code path exist in your environment.
  2. Apply the vendor-supported patch or mitigation from the primary advisory.
  3. Rescan the exact deployed revision and retain verification evidence.
Review primary references

Evidence coverage

FIRST-EPSSCVE-LIST-V5
SSVC priority
MEDIUM
Confidence
Not available
Aliases
None reported

Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.

Sources and record history

  1. VDB-370833 | GL.iNet GL-MT3000 Online Firmware Upgrade one_click_upgrade command injection ↗
  2. VDB-370833 | CTI Indicators (IOB, IOC, TTP, IOA) ↗
  3. CVE-2026-12187 | CVE Analysis and Report ↗
  4. Submit #815654 | GL.iNet GL-MT3000 4.4.5 Command Injection ↗
  5. Source repository ↗
  6. fw.gl-inet.com ↗

Record history

Published Jun 14, 2026 · Last refreshed Nov 3, 2026

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