Somewhere on your OT network, there are active vendor credentials tied to projects that closed months ago. Nobody submitted the revocation request because nobody owned that step. The project manager moved on, the plant engineer assumed IT handled it, and IT assumed OT did. Those credentials are live access points on a network segment connected to your process control systems, and both auditors and attackers are better at finding them than most organizations are at tracking them.
This ebook covers the five ways ungoverned vendor access exposes your operations, why tightening policy cannot fix the underlying problem, and the architecture controls that actually close the gap.
