Overview
A critical vulnerability has been discovered in D-Link DIR-619L 2.06B01, classified as CVE-2025-6615. This vulnerability specifically affects the formAutoDetecWAN_wizard4 function of the file /goform/formAutoDetecWAN_wizard4, and is triggered via the manipulation of the argument curTime. It is a stack-based buffer overflow vulnerability, which can be exploited remotely. The exploit is already public, magnifying the risk for systems that are still running the unsupported and outdated software.
This vulnerability matters because it can potentially compromise the entire system or lead to data leakage. Given the severity of the impact, it is crucial for users to update their system to the latest version or apply necessary patches as early as possible.
Vulnerability Summary
CVE ID: CVE-2025-6615
Severity: Critical – CVSS Score 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
How the Exploit Works
The exploit works by manipulating the ‘curTime’ argument in the formAutoDetecWAN_wizard4 function of the file /goform/formAutoDetecWAN_wizard4. This manipulation causes a stack-based buffer overflow, which can lead to arbitrary code execution. Since the exploit can be triggered remotely over the network without requiring any user interaction, it poses a significant threat to the affected systems.
Conceptual Example Code
The following is a conceptual example of how this vulnerability might be exploited. This example is not intended for actual use, but to give a general understanding of the vulnerability.
POST /goform/formAutoDetecWAN_wizard4 HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
curTime= [Overflowing Buffer String]In this request, the ‘curTime’ argument is filled with a string that overflows the buffer. This overflow could potentially allow the execution of arbitrary code, resulting in a system compromise.
Mitigation Guidance
To mitigate the risk of this vulnerability, it is strongly recommended to apply the vendor patch. If the patch is not available or the product is no longer supported, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary mitigation. However, it’s important to note that these are not permanent solutions and replacing unsupported products should be considered as soon as possible.