CVE-2021-39510 : What You Need to Know

This CVE article provides insights into a security vulnerability discovered in the D-Link DIR816_A1_FW101CNB04 750m11ac wireless router.

Understanding CVE-2021-39510

CVE-2021-39510 is a vulnerability found in the D-Link DIR816_A1_FW101CNB04 750m11ac wireless router, leading to command injection through shell metacharacters.

What is CVE-2021-39510?

A flaw in the handling of HTTP request parameters in the /goform/form2userconfig.cgi route can allow constructing a user name string to delete the user function, resulting in command injection.

The Impact of CVE-2021-39510

The vulnerability can be exploited by attackers to execute arbitrary commands on the affected system, potentially leading to unauthorized access and control.

Technical Details of CVE-2021-39510

This section explores the technical aspects of the CVE.

Vulnerability Description

The issue arises from improper handling of HTTP request parameters, allowing for the construction of malicious user names and subsequent command injection using shell metacharacters.

Affected Systems and Versions

Product: D-Link DIR816_A1_FW101CNB04 750m11ac wireless router
Version: Not Available

Exploitation Mechanism

The vulnerability is exploited by manipulating the HTTP request parameters in the /goform/form2userconfig.cgi route to inject malicious commands through shell metacharacters.

Mitigation and Prevention

Learn how to mitigate the risks associated with CVE-2021-39510

Immediate Steps to Take

Update the router firmware to the latest version provided by D-Link.
Implement strong password policies to prevent unauthorized access.

Long-Term Security Practices

Regularly monitor network traffic for signs of suspicious activities.
Conduct security audits and penetration testing to identify vulnerabilities.

Patching and Updates

D-Link has released patches to address the vulnerability. Ensure timely application of these patches to secure the affected devices.