Topic starter
23/10/2026 12:45 am
TL;DR: Hidden access paths and firmware gaps leave OT exposure outside effective control, because teams still stop at inventory and network diagrams, Dragos warns. Operational risk stays partly unseen until service accounts, configuration changes, and supply chain weaknesses are tied back to production systems.
Editorial analysis by NHI Mgmt Group, based on content published by Dragos: “Visibility Was Never the Finish Line”.
Key questions
Q: Why do hidden credentials and access paths increase xOT risk?
A: Because process impact is often created by who can change devices, not just which devices exist.
Q: What signs show OT visibility is still incomplete?
A: Common signs include unknown assets, stale spreadsheets, missing firmware data, and a gap between what the network team sees and what the process owners can explain.
Q: What breaks when OT asset inventory is incomplete?
A: Incomplete OT asset inventory breaks segmentation, vulnerability prioritisation, and incident response because security teams cannot reliably tell which devices exist, where they are, or what they connect to.
Practitioner guidance
- Expand asset discovery into exposure management Track firmware version, patch level, configuration drift, and operator access alongside make and model so asset records support risk decisions.
- Map xOT identities and credentials Inventory service accounts, embedded credentials, and administrative touchpoints that can alter PLCs, HMIs, and connected devices.
- Add software and firmware assurance Use SBOMs, binary analysis, and provenance checks to identify unsafe dependencies and hidden code paths before deployment.
Bottom line: OT visibility fails when teams stop at inventory and network diagrams, because the real exposure is also in firmware, access, and configuration.
Glossary terms: xOT, Exposure management, Firmware Provenance, Software Bill of Materials
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This topic was modified 6 days ago by NHI Mgmt Group
23/10/2026 9:49 am
Visibility debt is now an OT governance problem, not an inventory problem. Organisations that still treat discovery as a spreadsheet exercise are carrying blind spots in configuration, privilege, and software provenance. That is especially relevant where xOT systems blend physical process control with IT-connected dependencies, because the operational risk is created by what is missing from the governance model, not just what is missing from the asset list. Practitioners should treat visibility as a control domain, not a reporting output.
A few things that frame the scale:
- Only 5.7% of organisations have full visibility into their service accounts, according to the Ultimate Guide to NHIs.
- 96% of security operations teams report critical blind spots, most commonly in cloud infrastructure (74%) and identity and access behaviour (67%).
A question worth separating out:
Q: How should teams connect exposure management with supply chain assurance?
A: They should treat software and firmware risk as part of the same visibility programme as asset discovery. That means correlating SBOM data, binary analysis, and provenance checks with runtime asset intelligence so weaknesses are found before deployment and prioritised alongside live operational exposure.
👉 Read our full editorial: OT visibility fails when inventory stops at make and model
This post was modified 6 days ago by NHI Mgmt Group