A CWE-248: Uncaught Exception vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum, and Modicon Premium which could cause denial of service when reading invalid physical memory blocks in the controller over Modbus
https://www.talosintelligence.com/vulnerability_reports/TALOS-2019-0764
https://www.schneider-electric.com/en/download/document/SEVD-2019-134-11/