CVE-2021-26747 : Vulnerability Insights and Analysis

Netis WF2780 2.3.40404 and WF2411 1.1.29629 devices are vulnerable to Shell Metacharacter Injection in the ping command, allowing remote code execution.

Understanding CVE-2021-26747

This CVE refers to a security vulnerability present in Netis WF2780 and WF2411 devices that can be exploited for remote code execution.

What is CVE-2021-26747?

The vulnerability in Netis WF2780 2.3.40404 and WF2411 1.1.29629 devices allows attackers to inject shell metacharacters into the ping command, which could result in remote code execution on the affected devices.

The Impact of CVE-2021-26747

If successfully exploited, this vulnerability could lead to unauthorized remote access to the affected Netis devices, potentially compromising the confidentiality, integrity, and availability of data and services.

Technical Details of CVE-2021-26747

The following details outline the technical aspects of CVE-2021-26747:

Vulnerability Description

The vulnerability enables malicious actors to inject shell metacharacters into the ping command, which opens up the possibility of executing arbitrary remote code on the targeted Netis WF2780 and WF2411 devices.

Affected Systems and Versions

Netis WF2780 version 2.3.40404 and WF2411 version 1.1.29629 are confirmed to be impacted by this vulnerability. Devices running these specific versions are at risk.

Exploitation Mechanism

By leveraging the vulnerability to inject shell metacharacters into the ping command, threat actors can execute unauthorized remote code on the affected Netis devices, thereby gaining unauthorized access.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-26747, the following steps can be taken:

Immediate Steps to Take

Disable remote access to vulnerable devices if possible.
Implement network segmentation to restrict access to affected devices.
Monitor network traffic for any signs of exploitation.

Long-Term Security Practices

Keep systems and firmware updated with the latest patches from Netis.
Regularly audit and review device configurations and access controls.
Educate users about secure practices to prevent social engineering attacks.

Patching and Updates

Ensure that Netis WF2780 and WF2411 devices are updated with the latest firmware releases provided by Netis to address the CVE-2021-26747 vulnerability.