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CVE-2025-5852: Critical Buffer Overflow Vulnerability in Tenda AC6 15.03.05.16

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Overview

A critical vulnerability has been discovered in the formSetPPTPUserList function of the file /goform/setPptpUserList in Tenda AC6 15.03.05.16. This vulnerability has been given the identification CVE-2025-5852 and poses a significant threat to user data and system integrity. This vulnerability matters due to the severity of its potential impact; it can be exploited remotely and could potentially lead to system compromise or data leakage.

Vulnerability Summary

CVE ID: CVE-2025-5852
Severity: Critical (CVSS: 8.8)
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 AC6 | 15.03.05.16

How the Exploit Works

The vulnerability exploits a buffer overflow condition in the formSetPPTPUserList function of the file /goform/setPptpUserList. The manipulation of the argument list can cause the system to write data beyond the intended boundary of a fixed-length buffer. This can corrupt data, crash the system, or lead to the execution of malicious code.

Conceptual Example Code

The following is a conceptual example that demonstrates how the vulnerability might be exploited. This example should not be used for malicious purposes.

POST /goform/setPptpUserList HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "user_list": "A"*10000 }

In the example above, the user_list argument is filled with a large number of ‘A’ characters, which could overflow the buffer and lead to unexpected behavior, such as the execution of malicious code.

Mitigation

To mitigate this vulnerability, users are recommended to apply the vendor patch as soon as it becomes available. In the interim, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary mitigation. Regularly updating and patching systems can help prevent exploitation of such vulnerabilities.

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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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