OT Threat Landscape 2026: What OT Cybersecurity Defenders Need to Know

Executive Summary: The report outlines a dynamic OT/ICS threat landscape where state-aligned groups, financially motivated ransomware actors, and hacktivists target a small set of high-impact assets (engineering workstations, remote access infrastructure, identity systems, and edge devices). It highlights new and continuing adversary activity, widespread ransomware impact on industrial organizations, common intrusion pathways through IT-to-OT connections, a pervasive lack of OT visibility, and prescribes defensive priorities (operationally aware IR, segmentation, monitoring, remote access control, and vulnerability risk management) anchored to the SANS Five ICS Critical Security Controls.