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CVE-2025-50613: Buffer Overflow Vulnerability in Netis WF2880 v2.1.40207 Leading to Potential DoS Attacks

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Overview

The vulnerability in discussion, CVE-2025-50613, affects the Netis WF2880 v2.1.40207. It’s a buffer overflow vulnerability that can allow attackers to cause a program crash, potentially leading to a Denial of Service (DoS) attack. This presents a significant risk to organizations relying on this software, as it could lead to system compromise and data leakage.

Vulnerability Summary

CVE ID: CVE-2025-50613
Severity: High (7.5 CVSS Score)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise and data leakage

Affected Products

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Product | Affected Versions

Netis WF2880 | v2.1.40207

How the Exploit Works

The vulnerability resides in the FUN_00475e1c function of the cgitest.cgi file. Attackers can exploit this vulnerability by controlling the value of `wds_key_wep` in the payload. When an attacker sends an overly large value for `wds_key_wep`, it exceeds the buffer limit, causing a buffer overflow. This results in the program crashing, which can potentially lead to a Denial of Service (DoS) attack.

Conceptual Example Code

Here’s a conceptual example that demonstrates how the vulnerability might be exploited. This example assumes the attacker is sending a POST request with a large payload to the vulnerable endpoint.

POST /cgitest.cgi HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
wds_key_wep=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA...

In this example, the attacker sends a large amount of ‘A’ characters as the `wds_key_wep` value, triggering a buffer overflow and potentially causing a program crash or a DoS attack.
Please note that this is a conceptual example and may not represent an actual exploit scenario. It is intended for educational purposes 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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