Schneider Electric OPC UA DoS Flaw Threatens Global OT Operations
In October 2025, Schneider Electric disclosed a critical vulnerability (CVE-2024-10085) affecting its EcoStruxure OPC UA Server Expert and Modicon Communication Server. The flaw, identified as improper allocation of resources without limits or throttling, allows a remote attacker to overwhelm the targeted server with excessive OPC UA requests, resulting in a denial-of-service (DoS) and loss of real-time process data. The vulnerability, scored at CVSS v4 8.2, threatens industrial operations worldwide, particularly in critical sectors like energy and manufacturing, if not promptly mitigated. This incident underscores the increasing risk to industrial control systems (ICS) from remote, low-complexity attacks exploiting resource exhaustion bugs. It highlights ongoing attacker interest in operational technology environments and the urgent need for robust ICS security best practices and timely patch management.
Kill Chain