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

Quick assessment

Affected
GL.iNet GL-MT3000
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

GL-iNet gl-mt3000是中国GL-iNet公司的一款便携式无线路由器。 GL-iNet gl-mt3000 4.4.5及之前版本存在安全漏洞，该漏洞源于Online Firmware Upgrade Handler组件文件/usr/bin/one_click_upgrade存在未知功能，容易受到命令注入攻击。

CVSS 8.8 · High EPSS 1.94% · P80

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 7

VendorProduct Version RangeStatus
GL.iNet GL-MT3000 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
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I. Basic Information for CVE-2026-12187

Vulnerability Information
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Vulnerability Title
GL.iNet GL-MT3000 Online Firmware Upgrade one_click_upgrade command injection
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
在命令中使用的特殊元素转义处理不恰当(命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
GL-iNet gl-mt3000 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GL-iNet gl-mt3000是中国GL-iNet公司的一款便携式无线路由器。 GL-iNet gl-mt3000 4.4.5及之前版本存在安全漏洞，该漏洞源于Online Firmware Upgrade Handler组件文件/usr/bin/one_click_upgrade存在未知功能，容易受到命令注入攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
GL.iNet GL-MT3000 4.4.0 cpe:2.3:o:gl-inet:gl-mt3000_firmware:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-12187

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Qwen3.6-35B-A3B · 13884 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-12187

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Other References for CVE-2026-12187 (1)

Other References for CVE-2026-12187 (1)

IV. Related Vulnerabilities

Same product: GL-MT3000
Same vendor: GL.iNet
Same weakness: CWE-77

V. Comments for CVE-2026-12187

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