CVE-2021-21778: Mz-Automation LIB60870

High severity, CVSS 7.5. EPSS: 1.3% chance of exploitation in the next 30 days.

A denial of service vulnerability exists in the ASDU message processing functionality of MZ Automation GmbH lib60870.NET 2.2.0. A specially crafted network request can lead to loss of communications. An attacker can send an unauthenticated message to trigger this vulnerability.

Affected products

• Mz-Automation LIB60870: version 2.2.0 only

Published 2021-08-25. Last modified 2026-06-17.