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CVE-2025-55606: Buffer Overflow Vulnerability in Tenda AX3 V16.03.12.10_CN

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Overview

A significant vulnerability, CVE-2025-55606, has been identified in the Tenda AX3 V16.03.12.10_CN. This vulnerability, a Buffer Overflow in the fromAdvSetMacMtuWan function via the serverName parameter, could potentially allow an attacker to compromise systems or leak sensitive data. As Tenda AX3 is a widely used product, this vulnerability has extensive implications and warrants immediate attention.

Vulnerability Summary

CVE ID: CVE-2025-55606
Severity: High (7.5 CVSS Score)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: System compromise and potential data leakage

Affected Products

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Product | Affected Versions

Tenda AX3 | V16.03.12.10_CN

How the Exploit Works

The vulnerability is a Buffer Overflow in the fromAdvSetMacMtuWan function, which can be exploited via the serverName parameter. An attacker can send specially crafted data that, when processed by the fromAdvSetMacMtuWan function, causes the system to overwrite adjacent memory, potentially leading to arbitrary code execution or causing the system to crash.

Conceptual Example Code

An example of how the vulnerability might be exploited is shown below. The “serverName” parameter is filled with a large amount of data, causing a buffer overflow:

POST /fromAdvSetMacMtuWan HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "serverName": "AAAAAAAAA...[continue until buffer overflow]" }

Mitigation Guidance

The most effective mitigation strategy is to apply the official patch from the vendor. Until then, implementing a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary mitigation by detecting and blocking attempts to exploit this vulnerability.

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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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