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CVE-2025-7790: Critical D-Link DI-8100 Vulnerability Allows Remote Exploitation

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Overview

In today’s interconnected digital world, cybersecurity vulnerabilities pose serious threats to enterprises and individuals alike. One such vulnerability, CVE-2025-7790, has recently been identified in the D-Link DI-8100 16.07.26A1. This vulnerability is particularly critical as it allows for remote exploitation, potentially putting sensitive data and system integrity at risk. It is therefore crucial for users of the affected version to understand the implications and take immediate steps to mitigate this threat.

Vulnerability Summary

CVE ID: CVE-2025-7790
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

D-Link DI-8100 | 16.07.26A1

How the Exploit Works

The vulnerability resides in an unknown part of the file /menu_nat.asp of the HTTP Request Handler component. The manipulation of the argument out_addr/in_addr/out_port/proto leads to stack-based buffer overflow. This overflow can be exploited by a remote attacker to potentially inject malicious code into the system. The exploit has been disclosed to the public and may be used.

Conceptual Example Code

Considering the information available, an attacker might exploit the vulnerability with a specially crafted HTTP request, similar to the conceptual example below:

POST /menu_nat.asp HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
out_addr=ATTACKER_CONTROLLED_DATA&in_addr=ATTACKER_CONTROLLED_DATA&out_port=ATTACKER_CONTROLLED_DATA&proto=ATTACKER_CONTROLLED_DATA

In this case, the `ATTACKER_CONTROLLED_DATA` fields would be populated with data designed to overflow the buffer, potentially allowing the attacker to execute arbitrary code.

Remediation

The best course of action to mitigate this vulnerability is to apply the vendor-supplied patch as soon as it becomes available. In the meantime, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as a temporary mitigation measure. It is also advisable to follow best practices for secure coding to prevent such vulnerabilities in the first place.

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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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