Overview
The recently discovered CVE-2025-6511 vulnerability presents a critical risk to users of the Netgear EX6150 firmware version 1.0.0.46_1.0.76. This vulnerability resides in the sub_410090 function and can lead to a stack-based buffer overflow, potentially compromising the entire system or leading to data leakage. Given the severity of this vulnerability and the fact that it can be exploited remotely, it is of utmost importance that users apply the necessary patches or mitigations as soon as possible.
Vulnerability Summary
CVE ID: CVE-2025-6511
Severity: Critical (CVSS: 8.8)
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
Netgear EX6150 | 1.0.0.46_1.0.76
How the Exploit Works
The CVE-2025-6511 vulnerability arises due to insufficient bounds checking in the sub_410090 function. An attacker can send specially crafted input to this function, causing a buffer overflow condition. This can lead to the execution of arbitrary code within the context of the application. As the vulnerability can be exploited remotely and does not require any user interaction or special privileges, it poses a significant risk.
Conceptual Example Code
Below is a conceptual example of how an attacker might exploit the vulnerability. This example uses a hypothetical HTTP request that includes a malicious payload designed to trigger the buffer overflow:
POST /sub_410090 HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "input": "A"*1024 }In this example, the “input” field contains a string of 1024 “A” characters. If the buffer assigned to hold this input is smaller than 1024 bytes, it will result in a buffer overflow.
Recommended Mitigation
Users of the affected Netgear EX6150 firmware version are strongly advised to apply the vendor patch as soon as it becomes available. In the meantime, users can implement a Web Application Firewall (WAF) or Intrusion Detection System (IDS) as a temporary mitigation measure. These tools can help detect and block malicious traffic that attempts to exploit the vulnerability.