When should organisations re-evaluate access instead of relying on long-lived entitlements?

Why This Matters for Security Teams

Access review is not a calendar exercise when identities are non-human or when systems can change faster than the review cycle. Long-lived entitlements become risky the moment the original business justification disappears, because service accounts, API keys, and automation tokens tend to outlast projects, integrations, and owners. The result is privilege that still works but no longer has a purpose.

NHIMG research shows that only 20% of organisations have formal processes for offboarding and revoking API keys, and 71% of NHIs are not rotated within recommended time frames, which helps explain why stale access persists. That gap is especially dangerous when access is tied to old tickets or fixed review dates instead of current context. Current guidance from the OWASP Non-Human Identity Top 10 treats unmanaged lifetime and privilege as a core failure mode, not an edge case.

Security teams usually do not discover the problem during a neat quarterly review. In practice, many teams encounter it only after a project shuts down, a vendor relationship ends, or a token is abused long after the original owner has moved on.

How It Works in Practice

Re-evaluating access means tying entitlement decisions to the current business context, not to a static approval record. For human users, that can mean re-checking role, project membership, and data sensitivity whenever a person changes team, manager, or responsibility. For NHIs, it means validating whether the workload still exists, whether the integration is still needed, and whether the credentials or tokens still match the intended use.

That re-check is most effective when it happens at the event that changes risk. Examples include project closure, application decommissioning, vendor offboarding, incident response, a new data classification, or a shift from read-only to write access. Current best practice also favors shorter-lived secrets and just-in-time access rather than entitlements that remain valid for months. NHIMG’s Ultimate Guide to NHIs — Static vs Dynamic Secrets is useful here because it frames the operational difference between credentials that linger and credentials that can be revoked or expire quickly.

• Trigger reviews on lifecycle events, not only on a fixed cycle.
• Require an active business owner for every entitlement.
• Revalidate sensitive access after scope, data, or vendor changes.
• Use expiry, rotation, and revocation for secrets that support automation.

Where possible, align review logic with NIST Cybersecurity Framework 2.0 principles for ongoing governance and access control, and feed findings into inventory so stale access does not reappear in the next onboarding workflow. These controls tend to break down in highly distributed environments with shadow integrations, because no single team has a complete view of who still depends on the access.

Common Variations and Edge Cases

Tighter access review often increases operational overhead, requiring organisations to balance reduced exposure against administrative burden and workflow friction. That tradeoff is real, especially in environments with many short-lived jobs, automation pipelines, or external partners. There is no universal standard for review frequency that fits every use case; current guidance suggests using the sensitivity of the asset and the volatility of the business relationship to set the cadence.

Some access should be re-evaluated immediately, not on a routine schedule. High-risk examples include privileged admin roles, production write access, production secrets, third-party integrations, and credentials tied to customer data. Other access can be reviewed on a shorter but still periodic basis if the risk is lower and the change rate is low.

NHIMG’s Ultimate Guide to NHIs highlights how broad NHI exposure and weak offboarding processes create long tails of unnecessary access. The same logic applies to teams using Zero Trust Architecture: trust should be continuously re-justified, not assumed to remain valid because a permission existed last quarter. In fast-moving cloud and SaaS estates, static entitlement reviews tend to lag behind reality because ownership, APIs, and integrations change faster than the review workflow can keep up.

Related resources from NHI Mgmt Group

• Should organisations use SSH certificates instead of long-lived keys?
• How can organisations reduce risk from long-lived AI agent access?
• When should organisations re-evaluate their perimeter access model?
• When should organisations re-evaluate database access controls for AI workloads?