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

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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.

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