CVE-2021-20158 : Security Advisory and Response

This CVE-2021-20158 article provides an overview of an authentication bypass vulnerability found in Trendnet AC2600 TEW-827DRU version 2.08B01. Learn about the impact, technical details, and mitigation steps.

Understanding CVE-2021-20158

CVE-2021-20158 identifies an authentication bypass vulnerability in Trendnet AC2600 TEW-827DRU version 2.08B01, allowing unauthorized access to change the admin password through a concealed administrative command.

What is CVE-2021-20158?

The CVE-2021-20158 vulnerability involves an authentication bypass issue in the affected Trendnet router model, enabling malicious actors to alter the admin password without authentication, posing a significant security risk.

The Impact of CVE-2021-20158

The impact of CVE-2021-20158 is severe as it permits unauthenticated attackers to compromise the security of the affected router by changing the admin password through a hidden administrative command, potentially leading to unauthorized access and control.

Technical Details of CVE-2021-20158

Understanding the vulnerability description, affected systems, versions, and exploitation mechanism is crucial to comprehending the nature of CVE-2021-20158.

Vulnerability Description

Trendnet AC2600 TEW-827DRU version 2.08B01 contains an authentication bypass flaw that allows bad actors to manipulate the admin password without authentication through a concealed administrative command.

Affected Systems and Versions

The affected system is the Trendnet AC2600 TEW-827DRU router with version 2.08B01 installed, making it vulnerable to exploitation by unauthorized users.

Exploitation Mechanism

Exploiting CVE-2021-20158 involves leveraging the authentication bypass vulnerability in the router's version 2.08B01 to force a modification of the admin password without the need for legitimate credentials.

Mitigation and Prevention

To address CVE-2021-20158 effectively, implementing immediate and long-term security measures is essential.

Immediate Steps to Take

Users should promptly update the affected router to a patched version, change default passwords, and restrict network access to mitigate the risk of unauthorized password changes.

Long-Term Security Practices

Employing strong passwords, network segmentation, regular security audits, and staying informed about security updates and patches are essential for long-term protection against similar vulnerabilities.

Patching and Updates

Regularly checking for firmware updates from Trendnet and promptly applying patches for known vulnerabilities like CVE-2021-20158 is crucial to maintaining the security of the network and preventing unauthorized access.