Modicon Quantum 140 NOE771x1 Security Vulnerability Notification

This document details a high-severity denial-of-service vulnerability (CVE-2019-6811) in Schneider Electric's Modicon Quantum 140 NOE771x1 controllers, caused by an improper check for unusual conditions (CWE-754) when processing oversized IP fragmented packets. It provides remediation steps, including upgrading to firmware version 7.0, and recommends migrating to the Modicon M580 ePAC controller as the affected product has reached end of life.