They should compare actual entitlements against current job needs, confirm that least privilege still holds, and verify that terminated or transferred users have been de-provisioned. Reviews should also surface stale access, exceptions that are no longer justified, and third-party accounts that sit outside normal HR-driven controls. The goal is to close gaps before they become exposure.
What security teams should verify in an access review
An access review is not a checkbox exercise. It should confirm that each person or account still needs the access it holds, that access levels match present duties, and that removed, moved, or inactive users no longer retain permissions. The review also has to catch exceptions, inherited access, and third-party accounts that can drift outside ordinary lifecycle controls.
Teams get the most value when they review actual entitlements, not just role labels. A role can look reasonable while the underlying permissions have drifted, so the reviewer should be checking for privilege creep, stale access, and access that no longer aligns with the current job or service function.
For teams building a repeatable review process, NHIMG’s Access Reviews and Certification Guide is the most direct reference for reducing review volume without losing control. The broader context in IAM and IGA Basics helps reviewers distinguish access governance from simple account administration.
What gets missed when reviews are too shallow
The most common failure is rubber-stamping. If reviewers approve access because it belongs to a familiar team or because the list is too long to inspect carefully, excessive privilege survives unchanged. That is especially dangerous when a person has changed jobs, when a contractor has stayed past the engagement end date, or when a shared or delegated account is treated as if it were still active by design.
Access reviews should also look for accounts that sit outside the normal HR-driven flow, including third-party access, service-linked access, and access created for one-off exceptions. Those accounts often survive because nobody owns the cleanup, not because they are still justified. NHIMG’s Joiner-Mover-Leaver (JML) Guide and Privileged Access Management Guide are useful when the review must prove that mover and leaver changes actually removed access and reduced standing privilege.
When access review findings keep recurring, the issue is usually not the reviewer, it is the control design. If the organisation cannot explain why the access exists, who owns it, and when it should expire, the review is already overdue for remediation.
How to turn a review into remediation
The review should end with a clean decision for every item: retain, remove, reduce, or re-justify. Anything marked as an exception should have an owner, a reason, and an expiry or next review date. That is what prevents an access review from becoming a document archive instead of a control.
For teams with mixed human, contractor, and machine access, the reviewer should not stop at the user record. If the access is supported by a long-lived credential, token, or delegated account, the associated secret or path should be checked at the same time. NHIMG’s NHI Lifecycle Management Guide and Cloud Workload Identity Guide help reviewers think about lifecycle and exposure for non-human access paths without treating them as a separate cleanup problem.
Third-party and privileged access deserve extra scrutiny because the blast radius is usually larger and the business justification is easier to overstate. A good review does not ask only whether access is still “used”; it asks whether the access is still necessary, whether it is still bounded, and whether the owner would notice if it were removed.
Risk and Threat Considerations
Stale or excessive access creates a direct exposure path: one unneeded entitlement can become the easiest route to misuse, lateral movement, or unauthorized data access. The risk rises when reviews are treated as a mass approval exercise, because the control then records a false sense of assurance instead of removing actual privilege.
Failure mechanism: Permissions persist after role changes, offboarding, or exception expiry, while reviewers accept the current state without validating business need or ownership. That leaves dormant accounts, overprivileged users, and third-party access in place long enough for abuse or accidental misuse.
Impact: The organisation keeps access that should have been removed, widening the attack surface and increasing the chance of audit failure, insider misuse, or compromise through an account that no longer has a legitimate business purpose.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
NIST SP 800-53 Rev 5 and CIS Controls v8 set the technical controls, while ISO/IEC 27001:2022 defines the regulatory obligations.
| Framework | Control / Reference | Relevance |
|---|---|---|
| NIST SP 800-53 Rev 5 | AC-2 — Account Management | User access reviews directly govern account status and entitlement maintenance. |
| AC-6 — Least Privilege | The review is meant to confirm access remains limited to current job need. | |
| IA-5 — Authenticator Management | Reviews often expose stale credentials and access paths tied to accounts. | |
| Recommendation — Review accounts regularly and disable or remove access that is no longer justified. Revalidate permissions against least-privilege need and remove excess access. Check whether authenticators and related access material still need to exist and remain active. | ||
| CIS Controls v8 | CIS-5 — Account Management | Access reviews operationalise account inventory, review, and removal of unnecessary access. |
| Recommendation — Inventory accounts and revoke access that no longer matches current business need. | ||
| ISO/IEC 27001:2022 | A.5.18 — Access rights | This access-review question is about verifying, adjusting, and removing rights over time. |
| Recommendation — Review access rights periodically and remove or amend rights that are no longer required. | ||
Practitioner Guidance
What to verify: Check the entitlement itself, not just the account owner, and confirm that each permission still maps to a current job duty, contract, or service need. If a reviewer cannot explain why access exists in one sentence, it should usually be marked for follow-up.
Decision rule: If the access survives only because it was approved in the past, treat that as insufficient. If the access is tied to a terminated, transferred, or inactive user, or to a third party without an active owner, prioritise removal before spending time on lower-risk review items.
Practitioner takeaway: The best access reviews remove uncertainty, not just names from a list, because every unchallenged entitlement is a control failure waiting for a trigger.
Related resources from NHI Mgmt Group
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Reviewed and updated by the NHIMG editorial team on September 28, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org
