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CVE-2025-5787: Buffer Overflow Vulnerability in TOTOLINK X15

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Overview

A critical vulnerability has been identified in TOTOLINK X15 routers, specifically version 1.0.0-B20230714.1105. This vulnerability particularly affects the HTTP POST request handler, and it has the potential to compromise the system or leak sensitive data. Given that TOTOLINK routers are widely used, the risk magnitude is significant and could affect many users and businesses worldwide. It’s crucial to address this vulnerability to protect user data and maintain the integrity of networks.

Vulnerability Summary

CVE ID: CVE-2025-5787
Severity: Critical, CVSS Score 8.8
Attack Vector: Network (HTTP POST Request Handler)
Privileges Required: None
User Interaction: None
Impact: System compromise and potential data leakage

Affected Products

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Product | Affected Versions

TOTOLINK X15 | 1.0.0-B20230714.1105

How the Exploit Works

The vulnerability lies in the unknown functionality of the file /boafrm/formWsc of the component HTTP POST Request Handler. It occurs when an argument, specifically ‘submit-url,’ is manipulated, causing a buffer overflow. This overflow can potentially allow an attacker to execute arbitrary code on the system or even cause a system crash. The exploit can be launched remotely and does not require user interaction.

Conceptual Example Code

An example of how the vulnerability might be exploited is shown below. This is a hypothetical HTTP POST request that includes a malicious payload:

POST /boafrm/formWsc HTTP/1.1
Host: vulnerable-router-ip
Content-Type: application/x-www-form-urlencoded
submit-url= malicious_payload

In this example, the “submit-url” argument is manipulated with a malicious payload. This is where the buffer overflow occurs, leading to system compromise or potential data leakage.

Mitigation and Prevention

The immediate recommendation is to apply vendor patches as soon as they become available to close off this vulnerability. As a temporary mitigation, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can help detect and prevent exploitation attempts. However, these measures are interim and do not substitute patching the vulnerability. It is also recommended to limit access to the router’s management interface to trusted networks and hosts only.

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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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