Why do standing privileges create outsized risk in connected IT and OT environments?

Standing privileges create a durable attack path because access remains available long after the original need has passed. In connected IT and OT environments, that persistence increases the chance of misuse, credential theft, and unauthorized lateral movement. It also weakens resilience because attackers can exploit access that was never intended to stay active continuously.

Why This Matters for Security Teams

Standing privileges are risky because they turn access into a permanent condition instead of a temporary exception. In connected IT and OT environments, that permanence is especially dangerous: OT systems often support fragile operational processes, while IT systems expose the pathways attackers use to reach them. A single always-on account can become the bridge between business systems and production control.

This is why NIST Cybersecurity Framework 2.0 emphasises governance, access discipline, and resilience, while NHI-specific guidance from Ultimate Guide to NHIs — Why NHI Security Matters Now shows how persistent non-human access expands the blast radius of common failures. NHIMG research also notes that 97% of NHIs carry excessive privileges, which means standing access is often not just present, but overbroad as well.

Security teams frequently assume the real threat is the initial compromise, but in practice the more damaging issue is the access that remains usable after the original task, project, or maintenance window has ended. In practice, many security teams encounter the breach only after an attacker has already reused an account that should have been temporary.

How It Works in Practice

In mixed IT and OT estates, standing privileges typically accumulate through service accounts, vendor support accounts, integration tokens, and operational break-glass access. These identities are often created to keep systems running, but they are rarely revisited with the same discipline as human access. The result is access that outlives the business need and becomes difficult to monitor, rotate, or remove.

Practitioners reduce this risk by replacing permanent access with just-in-time provisioning, short TTL secrets, and tightly scoped approvals. For NHI-heavy environments, the practical pattern is: authenticate the workload, evaluate the request at runtime, issue the minimum access needed, and revoke it automatically when the task completes. That approach aligns with the direction of the OWASP Non-Human Identity Top 10 and the NHI lifecycle guidance in Ultimate Guide to NHIs — Key Challenges and Risks.

• Use workload identity, not shared passwords, to prove what the workload is before granting access.
• Prefer ephemeral credentials issued for a single task or change window.
• Separate OT control paths from IT administrative paths so compromise in one domain does not automatically cross into the other.
• Continuously log and review privileged activity, including vendor and machine-to-machine access.

For implementation, current guidance suggests pairing least privilege with stronger segmentation, policy-as-code, and rapid revocation controls, rather than relying on static RBAC alone. These controls tend to break down when vendor support access must remain available during production outages because the exception quickly becomes a standing privilege.

Common Variations and Edge Cases

Tighter privilege controls often increase operational overhead, requiring organisations to balance resilience against response speed. That tradeoff is real in OT, where engineering teams may need immediate access during downtime, safety events, or remote support calls. Best practice is evolving, and there is no universal standard for this yet, but most mature programmes treat exceptions as time-boxed and heavily monitored rather than permanent.

One common edge case is break-glass access. It can be necessary, but it should be isolated, logged, and reviewed after every use. Another is third-party support, where external engineers often need access to assets they do not own. The safer pattern is short-lived access tied to ticketed work, not shared credentials that remain valid between visits. NHIMG research highlights the scale of the problem: only 20% of organisations have formal offboarding and revocation processes for API keys, and 91.6% of secrets remain valid five days after notification, which shows how persistence becomes a real exposure window.

In OT-connected environments, standing privileges are hardest to eliminate where availability is prioritised over change control. That is exactly where attackers benefit most, because long-lived access in a fragile environment is easier to abuse than to detect.

Related resources from NHI Mgmt Group

• Why do standing privileges and overly permissive policies create outsized risk in modern environments?
• Why do weak or reused passwords still create outsized risk even in environments with MFA and zero trust?
• Why do dormant service accounts and unused APIs create outsized risk in aviation environments?
• Why do OAuth-connected apps create outsized NHI risk in SaaS environments?