How can security teams measure whether admin privilege is too concentrated?

Why This Matters for Security Teams

Concentrated admin privilege is not just a policy smell. It is a measurable blast-radius problem. If one identity can move across identity administration, endpoint control, and security policy, then compromise of that account can quickly become environment-wide impact. That is why teams should look beyond role names and measure what an admin can actually touch, disable, or reconfigure at runtime. The OWASP Non-Human Identity Top 10 and the Ultimate Guide to NHIs both point to the same pattern: over-privileged identities are a recurring root cause of operational exposure, not a theoretical governance issue.

NHIMG research shows that 97% of NHIs carry excessive privileges, and that aligns with what security teams see when admin access is inherited, duplicated, or left unchanged after system growth. Concentration matters because it reduces the number of failures required for a severe incident. One admin path that can alter policies, revoke logs, or expand access is functionally different from many narrow, task-specific paths. In practice, many security teams discover that privilege is too concentrated only after an audit, incident review, or access cleanup reveals the same account sat across multiple control planes for months.

How It Works in Practice

Measure concentration by mapping every admin identity to the control planes it can influence, then asking whether those powers are separable. A practical review starts with identity administration, device management, cloud tenancy settings, security tooling, and backup or recovery controls. If one account can approve itself into broader access, disable protection, or make changes without a second control, that is a concentration signal. Current guidance suggests focusing on effective privilege, not just assigned role labels.

Teams usually get better signal by combining inventory with action-based testing. Use this sequence:

• List all privileged human and non-human identities, including break-glass and automation accounts.
• Group permissions by control plane and count how many distinct administrative domains each identity can reach.
• Flag identities that can both change policy and execute the change, especially across identity, endpoint, and security operations.
• Review whether high-impact actions require just-in-time approval, separate operators, or compensating monitoring.
• Track standing privilege duration, because long-lived access usually hides concentrated control.

For non-human identities, the same logic applies, but the evidence often lives in tokens, service accounts, and API scopes rather than user roles. The Ultimate Guide to NHIs highlights how visibility gaps and excessive privileges make this harder to detect, while the OWASP Non-Human Identity Top 10 frames privileged NHI sprawl as an exposure multiplier. The useful question is not whether an account is called “admin,” but whether it can independently alter security posture, recover itself, and widen access faster than governance can intervene.

These controls tend to break down in hybrid environments where legacy directories, cloud consoles, and endpoint tooling each maintain separate authorization models and no one has a complete privilege map.

Common Variations and Edge Cases

Tighter privilege controls often increase operational friction, so organisations have to balance blast-radius reduction against response speed. A break-glass account, for example, may legitimately hold broad powers, but it should be isolated, monitored, and rarely used. Likewise, automation identities sometimes need wide read access and narrow write access across several systems, which can look concentrated unless the permissions are split by function.

There is no universal standard for this yet, but current guidance suggests measuring concentration across three lenses: number of control planes reachable, number of high-impact actions available without approval, and number of identities that can perform the same sensitive task. If the same person or service can both define policy and execute policy, concentration is high even when individual permissions appear modest. This is where NIST’s risk-based thinking in the AI Risk Management Framework is helpful as an operational model, even outside AI use cases, because it treats impact and context as part of the control decision.

Edge cases also include emergency operations, delegated administration, and vendor-managed access. In those environments, concentration is sometimes acceptable, but only with short-lived access, explicit logging, and independent review. If those safeguards are missing, the exception becomes the normal state.

Related resources from NHI Mgmt Group

• How do security teams know whether remote admin access is too broad?
• How do security teams know whether an agent has too much privilege?
• How do security teams measure whether OT machine identities are too exposed?
• Why are NHIs a critical concern for security teams?