Jun 15, 2026 | Adam Fearn, Senior OT Architect, Radiflow
A vulnerable device can sit inside an industrial network looking entirely harmless. The screen still works. The PLC still runs. Products are still leaving the factory. Nothing is smoking, leaking, stopping, or lying in bits on the floor.
This is what makes OT cyber security genuinely difficult. It has to compete for attention with problems that are much easier to see.
When a machine stops working, the response is immediate. People gather around it. Phones ring, meetings are called, engineers appear. The problem gets attention because it demands attention.
Cyber risk doesn’t work like that. A vulnerability can sit quietly inside a device for months, visible only to someone who has looked carefully at the right data. In the meantime, the engineer has twelve other things to do, and the day carries on.
This isn’t because operational leaders don’t care about cyber security. In experience, the good ones care deeply. But they are balancing far more risk than people often realise: security against production schedules, the need to fix something against the real possibility that fixing it badly creates a bigger problem than the one you started with. And then there’s the 20-year-old obsolete PLC in the corner, or the device nobody dares touch because no one is quite sure what happens if they do.
Intervening in invisible risks invites more problems into an already difficult week. Take the plant down to patch something and it impacts everyone, immediately. Leave the vulnerability in place and, for now at least, the day carries on.
The instinct in cyber security is often to add more. More dashboards, more alerts, more lengthy reports full of technical findings. In OT environments, this tends to make the problem worse, not better. Operational teams don’t need more information. They need clearer information.
A long list of CVEs ranked by technical severity doesn’t help a plant manager decide what to do on a Tuesday morning when production is running and the maintenance window is three weeks away. What helps is understanding which vulnerabilities actually matter in their specific environment. Which ones could affect production, compromise safety, or create a quality issue – and what a sensible first step looks like.
The most useful work in OT cyber security is translation: taking technical exposure and connecting it to something operational teams already understand.
That means continuous assessment of how vulnerabilities map to actual operational impact. Not just severity scores, but real business consequence. It means passive monitoring that builds a live picture of the network without touching a single operational device. And it means presenting findings in language that makes sense to the people who have to act on them.
This is the approach Radiflow is built around. Not more noise, but a clearer view of what matters, why it matters, and what can sensibly be done next.
