CVE-2021-20986 Explained : Impact and Mitigation

A Denial of Service vulnerability was found in Hilscher PROFINET IO Device V3 in versions prior to V3.14.0.7. This may lead to unexpected loss of cyclic communication or interruption of acyclic communication.

Understanding CVE-2021-20986

This CVE identifies a Denial of Service vulnerability in Hilscher PROFINET IO Device, impacting various products and versions from Pepper+Fuchs.

What is CVE-2021-20986?

CVE-2021-20986 is a Low complexity, High impact Denial of Service vulnerability affecting Hilscher PROFINET IO Device V3 with versions prior to V3.14.0.7.

The Impact of CVE-2021-20986

The vulnerability could result in unexpected disruption of communication, potentially affecting the availability of the affected systems.

Technical Details of CVE-2021-20986

This section provides detailed technical insights into the vulnerability.

Vulnerability Description

The vulnerability in Hilscher PROFINET IO Device V3 could lead to a Denial of Service by causing interruptions in communication.

Affected Systems and Versions

The vulnerability impacts multiple products from Pepper+Fuchs with specific versions detailed for each product.

Exploitation Mechanism

The vulnerability may be exploited by sending specially crafted requests to the affected device, triggering the Denial of Service condition.

Mitigation and Prevention

Discover effective steps to mitigate the risk and prevent exploitation of CVE-2021-20986.

Immediate Steps to Take

Users should apply the necessary patches or updates provided by the vendors to address the vulnerability promptly.

Long-Term Security Practices

Adopting robust security measures and regular updates can enhance the overall security posture of the affected systems.

Patching and Updates

Regularly check for security advisories and apply patches or updates released by Hilscher and Pepper+Fuchs to ensure protection against CVE-2021-20986.