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CVE-2025-57637: Buffer Overflow Vulnerability in D-Link DI-7100G Potentially Allowing System Compromise

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Overview

The CVE-2025-57637 vulnerability was identified in the D-Link DI-7100G’s jhttpd service, specifically in the sub_451754 function of the viav4 parameter. This buffer overflow vulnerability can be exploited by attackers to cause a denial of service or execute arbitrary code, potentially leading to system compromise or data leakage. It is, therefore, critical for users of this product to understand the implications of this vulnerability and take the necessary mitigation steps.

Vulnerability Summary

CVE ID: CVE-2025-57637
Severity: High (7.5 CVSS Score)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Denial of Service, Execution of Arbitrary Code, Potential System Compromise, Data Leakage

Affected Products

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Product | Affected Versions

D-Link DI-7100G | 2020-02-21

How the Exploit Works

The exploit takes advantage of a buffer overflow vulnerability in the sub_451754 function of the jhttpd service’s viav4 parameter. By sending crafted network packets that exceed the buffer’s memory allocation, an attacker can cause the system to overflow. This overflow can lead to a denial of service, or worse, provide the attacker with the ability to execute arbitrary code on the system.

Conceptual Example Code

The following is a simplified, conceptual example of how the vulnerability might be exploited.

POST /sub_451754 HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
viav4=<buffer_overflow_data>

In this example, `` represents a payload that causes the system’s buffer to overflow, leading to a potential denial of service or arbitrary code execution.

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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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