CVE-2026-75578
Received Received - Intake

Command Injection in Cudy TR3000 Router Firmware

Publication date: 2026-11-13

Last updated on: 2026-11-13

Assigner: VulnCheck

Description
Cudy TR3000 before 2.5.42 contains a command injection vulnerability in luci/model/cbi/vpn/openvpn/client.lua, which embeds the shellquote()-quoted remote host token of an uploaded OpenVPN configuration inside an already single-quoted sed program run by os.execute(), so the nested quotes terminate the outer quote. Authenticated administrators can upload an .ovpn file whose remote host token contains a semicolon to execute arbitrary commands as root.

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Meta Information

Published
2026-11-13
Last Modified
2026-11-13
Generated
2026-11-13
AI Q&A
2026-11-13
EPSS Evaluated
N/A
NVD
CVE-2026-75578
EUVD
EUVD-2026-125258

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
cudy tr3000 to 2.5.42 (exc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-78 The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

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Executive Summary

Cudy TR3000 before 2.5.42 has a command injection flaw in the OpenVPN client configuration handler. An authenticated admin can upload a malicious .ovpn file with a crafted remote host token containing a semicolon. This token is improperly embedded in a sed command via os.execute(), allowing the nested quotes to break out of the single-quoted context and execute arbitrary root-level commands.

Detection Guidance

To detect this vulnerability, check the firmware version of your Cudy TR3000 device. If it is below 2.5.42, the device is vulnerable. Log in to the device's admin panel and verify the firmware version under system settings.

Impact Analysis

If exploited, this vulnerability allows an authenticated administrator to execute arbitrary commands as root on the Cudy TR3000 device. This could lead to full system compromise, unauthorized access, data theft, or disruption of network services. Attackers may gain control over the device and connected networks.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating confidentiality requirements under GDPR and HIPAA. Organizations using affected Cudy TR3000 devices may face compliance breaches, legal penalties, and reputational damage due to potential data exposure or loss of control over protected information.

Mitigation Strategies

Immediately update the Cudy TR3000 firmware to version 2.5.42 or later. Avoid uploading untrusted OpenVPN configuration files. Restrict administrative access to trusted users only.

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