CVE-2021-40390 : What You Need to Know

This CVE-2021-40390 article provides details about an authentication bypass vulnerability in Moxa MXView Series 3.2.4 affecting multiple systems.

Understanding CVE-2021-40390

CVE-2021-40390 is a critical vulnerability in Moxa MXView Series 3.2.4 that allows unauthorized access via a specially-crafted HTTP request.

What is CVE-2021-40390?

An authentication bypass vulnerability in the Web Application functionality of Moxa MXView Series 3.2.4
Attackers can exploit this by sending a specific HTTP request to gain unauthorized access

The Impact of CVE-2021-40390

CVSS Score: 10 (Critical)
Attack Vector: Network
Impact: High impact on confidentiality, integrity, and availability
Vulnerability Type: Authentication bypass via hard-coded credentials (CWE-798)
For more details, refer to the Talos Intelligence report

Technical Details of CVE-2021-40390

This section delves deeper into the technical aspects of the vulnerability.

Vulnerability Description

Authentication bypass vulnerability in Moxa MXView Series 3.2.4
Allows unauthorized access via a crafted HTTP request

Affected Systems and Versions

Affected Product: MXView Series
Vendor: Moxa
Affected Version: 3.2.4

Exploitation Mechanism

Low attack complexity with no required privileges, making it more dangerous
Attackers can exploit it through network-based access with a specially-crafted HTTP request

Mitigation and Prevention

Learn how to mitigate the risks associated with CVE-2021-40390.

Immediate Steps to Take

Apply patches or updates provided by Moxa promptly
Implement network segmentation to limit access
Monitor network traffic for suspicious activities

Long-Term Security Practices

Conduct regular security assessments and penetration testing
Train users on identifying and reporting potential security threats

Patching and Updates

Regularly check for security updates from Moxa
Keep systems up to date with the latest patches to prevent exploitation