CVE-2021-22786 Explained : Impact and Mitigation

A CWE-200: Information Exposure vulnerability exists in Schneider Electric's Modicon controllers that could lead to the exposure of sensitive information stored in memory when using the Modbus TCP protocol.

Understanding CVE-2021-22786

This section delves into the impact and technical details of CVE-2021-22786.

What is CVE-2021-22786?

The vulnerability exposes sensitive data stored in the memory of Modicon controllers during communication over the Modbus TCP protocol.

The Impact of CVE-2021-22786

The exposure of sensitive information can result in unauthorized access to critical data, posing a significant security risk.

Technical Details of CVE-2021-22786

Explore the specific aspects of the vulnerability.

Vulnerability Description

The vulnerability allows attackers to access sensitive information stored in the memory of Modicon controllers through the Modbus TCP protocol.

Affected Systems and Versions

Schneider Electric's Modicon M340, M580, MC80, Momentum, and Legacy Modicon Quantum controllers are affected by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability by communicating with the affected controllers over the Modbus TCP protocol.

Mitigation and Prevention

Discover the necessary steps to mitigate the risks associated with CVE-2021-22786.

Immediate Steps to Take

Implement network segmentation, restrict access to the controllers, and monitor for any suspicious activities.

Long-Term Security Practices

Regularly update firmware, conduct security assessments, and educate users on secure communication practices.

Patching and Updates

Apply the latest security patches provided by Schneider Electric to address the vulnerability and enhance system security.