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CVE-2025-4749: Critical Remote Denial of Service Vulnerability in D-Link DI-7003GV2

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Overview

This report focuses on a critical vulnerability found in D-Link DI-7003GV2 24.04.18D1 R(68125), identified as CVE-2025-4749. The vulnerability affects the Factory Reset Handler function, resulting in a denial of service. This problem is significant because the exploit is public, making the affected systems vulnerable to potential compromise and data leakage if not promptly addressed.

Vulnerability Summary

CVE ID: CVE-2025-4749
Severity: Critical, CVSS score 7.5
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Denial of service leading to potential system compromise or data leakage

Affected Products

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Product | Affected Versions

D-Link DI-7003GV2 | 24.04.18D1 R(68125)

How the Exploit Works

The vulnerability resides in the Factory Reset Handler function of the file /H5/backup.asp?opt=reset. A malicious actor can manipulate this function to trigger a denial of service remotely. The exploit has been disclosed to the public, increasing the risk for systems running the affected version of D-Link DI-7003GV2.

Conceptual Example Code

Here is a conceptual example of how the vulnerability might be exploited. This is a hypothetical HTTP request that might be used to trigger the vulnerability:

GET /H5/backup.asp?opt=reset HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
{ "manipulated_payload": "..." }

Mitigation and Recommendations

Users of D-Link DI-7003GV2 are advised to apply the vendor’s patch to correct this vulnerability. If the patch cannot be promptly applied, the use of a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) can serve as a temporary mitigation measure. However, these are not long-term solutions and do not address the underlying issue. Therefore, applying the vendor’s patch must remain a priority.

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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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