Topic starter
28/05/2026 11:39 am
TL;DR: Operational technology environments keep privileged access in place longer than enterprise IT usually would, because availability, vendor support, and maintenance windows limit how fast controls can change, according to Delinea. The governance problem is not just access volume but accumulated exception paths, making blast-radius control the practical priority for OT teams.
Editorial analysis by NHI Mgmt Group, based on content published by Delinea: “Securing privileged access in OT without disrupting operations”.
Key questions
Q: What breaks when OT privileged access is left in shared accounts and exceptions?
A: What breaks is accountability.
Q: Why do OT environments need different privileged access controls than enterprise IT?
A: OT environments often contain long-lived assets, separate identity stores, and narrow change windows that make standard IT access models too disruptive.
Q: What are the signs that privileged access governance is failing in OT networks?
A: Common warning signs include shared administrator accounts, inconsistent access rules across sites, unmonitored vendor sessions, and frequent exceptions for legacy compatibility.
Practitioner guidance
- Map the highest-risk access paths first Inventory shared administrator accounts, vendor remote access, service credentials, and engineering workstation privilege, then rank them by operational blast radius rather than by ease of remediation.
- Broker remote sessions through controlled paths Route external and internal privileged sessions through proxied, monitored, and recorded access so every high-value connection has an evidence trail.
- Reduce standing endpoint privilege Remove local administrator rights from engineering workstations where possible and replace them with controlled elevation for approved tasks only.
Bottom line: OT privileged access persists because uptime, vendor support, and maintenance windows constrain how quickly organisations can change controls.
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28/05/2026 11:44 am
OT privileged access is governed by operational tolerance, not by security preference. In OT, the control objective is not to minimise privilege as quickly as possible but to reduce exposure without breaking availability. That is why shared accounts and technical identities linger. The discipline problem for identity teams is that normal enterprise remediation assumptions do not survive production constraints. The practical conclusion is that OT privileged access must be governed as a continuity-sensitive identity lifecycle.
A few things that frame the scale:
- 97% of NHIs carry excessive privileges, increasing unauthorised access and broadening the attack surface, according to the Ultimate Guide to NHIs.
- 80% of identity breaches involved compromised non-human identities such as service accounts and API keys, according to the Ultimate Guide to NHIs.
A question worth separating out:
Q: How should teams sequence OT privilege reduction without disrupting operations?
A: Start with the access path that creates the widest blast radius, usually vendor remote access, shared privileged credentials, or unmanaged technical accounts. Then tighten session oversight and endpoint privilege in the order the plant, site, or control system can safely support.
👉 Read our full editorial: Securing privileged access in OT without disrupting uptime