CVE-2026-56758: Mz Automation GmbH LIBIEC61850

Medium severity, CVSS 6.5. EPSS: 0.3% chance of exploitation in the next 30 days.

The ACSE layer contains a flaw in the processing of AARQ PDUs during MMS connection establishment. When parsing certain fields within the calling AP title, an attacker controlled length value of zero or one may cause the parser to read past the end of a heap buffer.

Affected products

• Mz Automation GmbH LIBIEC61850: before 1.6.2 (fixed in 1.6.2)

Published 2026-07-30. Last modified 2026-09-08.