Modicon PAC Controllers Security Notification (SEVD-2022-221-02)

This document details a high-severity vulnerability (CVE-2022-37301) in multiple Modicon PAC and PLC controllers, involving an integer underflow that could cause a denial of service via Modbus TCP. It provides firmware remediation versions and mitigation steps for affected products, including M340, M580, Momentum, and MC80 controllers, while noting that legacy Quantum/Premium models are end-of-life.