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CVE-2025-52364: Insecure Permissions Vulnerability in Tenda CP3 Pro Firmware

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Overview

The cybersecurity vulnerability CVE-2025-52364 is a serious flaw in Tenda CP3 Pro Firmware V22.5.4.93. This vulnerability, characterized by insecure permissions, affects users of this firmware by allowing the telnet service to run by default at boot. It poses significant cybersecurity risks as it potentially allows unauthorized remote attackers to gain access to the device’s shell over the network, especially if default or weak credentials are used.

Vulnerability Summary

CVE ID: CVE-2025-52364
Severity: High (CVSS: 7.5)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage

Affected Products

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Product | Affected Versions

Tenda CP3 Pro Firmware | V22.5.4.93

How the Exploit Works

The exploit takes advantage of the telnet service (telnetd) that is initiated by default at boot via the initialization script /etc/init.d/eth.sh. This insecure permission setting can allow a remote attacker to connect to the device’s shell over the network, potentially without any authentication if default or weak credentials are present.

Conceptual Example Code

This is a conceptual example of how an attacker could potentially take advantage of this vulnerability using a telnet client:

$ telnet target_device_ip
Trying target_device_ip...
Connected to target_device_ip.
Escape character is '^]'.
login: admin
password: admin
# Successful login without any authentication due to insecure permission

Please note that this is a conceptual representation and that actual exploitation would depend on many factors including network configuration, firewall settings, and the presence of default or weak credentials.

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Disclaimer:

The information and code presented in this article are provided for educational and defensive cybersecurity purposes only. Any conceptual or pseudocode examples are simplified representations intended to raise awareness and promote secure development and system configuration practices.

Do not use this information to attempt unauthorized access or exploit vulnerabilities on systems that you do not own or have explicit permission to test.

Ameeba and its authors do not endorse or condone malicious behavior and are not responsible for misuse of the content. Always follow ethical hacking guidelines, responsible disclosure practices, and local laws.

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