Overview
The Common Vulnerabilities and Exposures (CVE) system has identified a critical security vulnerability, CVE-2025-4141, found in the EX6200 version 1.0.3.94 of Netgear’s product range. This vulnerability affects the function sub_3C03C and can lead to a buffer overflow attack if exploited. The criticality of this vulnerability is highlighted by its high CVSS score of 8.8, indicating a serious threat to the integrity and security of systems running the affected software. It is of utmost importance for network administrators and cybersecurity professionals to understand this vulnerability, apply appropriate mitigations, and protect their systems.
Vulnerability Summary
CVE ID: CVE-2025-4141
Severity: Critical (8.8 CVSS score)
Attack Vector: Remote
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage
Affected Products
No phone number, email, or personal info required.
Product | Affected Versions
Netgear EX6200 | 1.0.3.94
How the Exploit Works
The vulnerability in the affected Netgear product stems from an error in the ‘sub_3C03C’ function. Specifically, improper handling of the ‘host’ argument can cause a buffer overflow. In computer security and programming, a buffer overflow occurs when more data is put into a buffer or temporary data storage area than it can handle. This overflow can overwrite adjacent memory locations, potentially allowing an attacker to execute arbitrary code or cause a system crash.
Conceptual Example Code
The following is a conceptual example of how this exploit might be used in an attack. Note that this is a simplified representation and actual exploitation may require more sophisticated techniques.
POST /sub_3C03C/function HTTP/1.1
Host: target.example.com
Content-Length: [A value larger than the buffer size]
Content-Type: application/json
{ "host": "A string longer than the buffer size in the sub_3C03C function" }In this example, the attacker sends a malicious HTTP POST request to the vulnerable function. The ‘host’ argument is filled with a string longer than the buffer size in the ‘sub_3C03C’ function, causing a buffer overflow.
Remediation
At the time of writing, the vendor has not yet provided a patch to address this vulnerability. As an interim measure, users are advised to use a Web Application Firewall (WAF) or Intrusion Detection System (IDS) to mitigate the effects of potential exploits. However, these measures do not fully resolve the vulnerability, and users are strongly encouraged to apply the vendor’s patch once it becomes available.