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CVE-2025-44899: Critical Stack Overflow Vulnerability in Tenda RX3

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Overview

The cybersecurity world is constantly evolving, and with that comes the advent of new vulnerabilities, one of which is the CVE-2025-44899. This vulnerability has been identified in the Tenda RX3 V1.0br_V16.03.13.11, a popular router used by both individuals and businesses. It is a stack overflow vulnerability, which can be extremely dangerous as they can lead to arbitrary code execution or even a complete system compromise. The vulnerability lies within the fromSetWifiGusetBasic function of the web url /goform/ WifiGuestSet and manipulating the parameter shareSpeed results in a stack overflow.

Vulnerability Summary

CVE ID: CVE-2025-44899
Severity: Critical (9.8 CVSS Severity Score)
Attack Vector: Network
Privileges Required: Low
User Interaction: None
Impact: Potential system compromise or data leakage

Affected Products

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Product | Affected Versions

Tenda | RX3 V1.0br_V16.03.13.11

How the Exploit Works

The exploit works by manipulating the shareSpeed parameter in the fromSetWifiGusetBasic function of the web url /goform/ WifiGuestSet. By injecting a large amount of data, it can cause a stack overflow. This overflow can lead to unpredictable behavior, such as executing arbitrary code, crashing the system, or causing a system compromise.

Conceptual Example Code

Please note that the following is a conceptual example of how the vulnerability might be exploited. Actual exploitation would involve the use of specific tools and techniques.

POST /goform/WifiGuestSet HTTP/1.1
Host: target.example.com
Content-Type: application/json
{
"shareSpeed": "<payload causing stack overflow>"
}

This conceptual example shows how an attacker might send a malicious POST request to the vulnerable endpoint, injecting a payload into the shareSpeed parameter to trigger a stack overflow.

Mitigation

The best course of action for this vulnerability is to apply the vendor patch as soon as it becomes available. Until then, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary mitigation. These systems can be configured to detect and block attempts to exploit this vulnerability. Regular monitoring and logging of network activity can also aid in the early detection of any exploitation attempts.

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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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