In Episode 4 of the CISO's Guide to OT Security, Chris McLaughlin drills into the primary vulnerabilities attackers exploit in operational technology (OT) systems and explains why many historic incidents share the same weak points.

Chris outlines the four most common OT attack vectors: insecure remote access and internet-exposed devices; poor network segmentation and IT–OT bridges; software vulnerabilities, missing patches and misconfigurations; and human risks including phishing and insider threats. He illustrates each with real incidents such as water and pipeline breaches, Ukraine grid outages, and ransomware impacts on energy operations.

The episode also explains why these vulnerabilities persist — contractor and vendor access, legacy VPNs, forgotten remote tools, and risky contractual arrangements — and emphasizes collaboration between IT, OT and procurement to inventory and secure access. Practical steps include mapping all remote access points, applying zero-trust and MFA, prioritizing OT-aware patching and testing, improving user awareness and insider-threat controls, and updating contracts to require secure remote solutions.

Listeners will take away a clear sense of where OT systems are most exposed and what immediate actions can reduce risk. The episode closes by pointing to resources for ongoing threat intelligence and previews the next episode, Step 2: Hire a translator, which will help bridge communications between IT and OT teams.