User access reviews are the control point IAM teams still underuse

At a glance

What this is: This is a practitioner-focused explanation of user access reviews and how they support identity governance, compliance, and reduced unauthorized access.

Why it matters: For IAM and NHI teams, user access reviews matter because stale entitlements and weak revocation discipline create the same access-risk patterns that also affect service accounts, tokens, and other non-human identities.

👉 Read Clarity Security's article on user access reviews and compliance

Context

User access reviews are the recurring checks that confirm whether a person or system still needs the access it has. In practice, they are a governance control for limiting stale entitlements, reducing excess privilege, and proving that access decisions are being revisited rather than assumed permanent. For IAM programmes, the same discipline increasingly needs to extend to non-human identities, where access can persist far longer than intended.

The article frames user access reviews as an operational safeguard, not just a compliance checkbox. That matters because modern identity environments are fragmented across cloud, SaaS, and internal systems, which makes entitlement drift common and revocation harder to track. The typical starting point described here is common, especially in organisations that still rely on periodic human review rather than continuous entitlement governance.

Key questions

Q: How should security teams run user access reviews in practice?

A: Start with a complete entitlement inventory, assign each access path an owner, and review high-risk access more frequently than low-risk access. Focus first on privileged accounts, production systems, and regulated data. The review should end with an enforceable revoke, not just an attestation record. Automation helps, but ownership and risk ranking still decide whether the process is meaningful.

Q: Why do user access reviews fail in mature IAM programmes?

A: They fail when they become periodic paperwork instead of a live governance control. If the identity data is stale, the reviewer cannot make a sound decision, and if revocations are not enforced, the organization only documents risk instead of reducing it. The most common failure is treating all access as equal rather than prioritizing blast radius.

Q: What is the difference between access certification and access revocation?

A: Access certification is the decision to keep or remove access, while revocation is the technical action that removes it. A programme that stops at certification has only completed half the control. Mature IAM processes connect the two so an approval or denial is automatically reflected in the target system.

Q: Should non-human identities be included in access reviews?

A: Yes. Non-human identities can hold persistent access, reach sensitive systems, and outlive the business purpose that created them. If they are excluded from review, organizations leave a major blind spot in governance. Service accounts, API keys, tokens, and certificates should be reviewed with the same ownership and risk logic used for human users.

Technical breakdown

How user access reviews reduce entitlement drift

User access reviews work by comparing current entitlements against expected job function, system need, or risk tier. The control is simple in concept but difficult in execution because access changes continuously across applications, directories, and cloud services. If reviews happen too late or depend on stale ownership data, they validate yesterday’s access instead of today’s need. For non-human identities, the same problem appears with service accounts, tokens, and certificates that keep operating after their original purpose has changed. The technical value of UARs comes from forcing a fresh authorization decision before access becomes invisible technical debt.

Practical implication: Automate entitlement collection and review routing so reviewers see current access, not spreadsheet snapshots.

Why risk-based review is more effective than blanket recertification

Risk-based review prioritises high-impact identities, privileged accounts, and sensitive systems instead of treating every entitlement the same. That matters because the security value of a review rises when the decision is concentrated where the blast radius is highest. In identity programmes, blanket recertification often becomes administrative noise, while risk-weighted review can target privileged access, third-party access, and dormant accounts more effectively. For NHI governance, the same logic applies to API keys and workload identities that can reach production data or administrative interfaces.

Practical implication: Rank entitlements by privilege, system sensitivity, and business criticality before assigning review cycles.

How automation changes the mechanics of access review

Automation does not replace the review decision, but it removes the manual drag that causes delay and missed revocations. Typical automation patterns include access discovery, workflow assignment, attestation tracking, and integration with identity repositories and ticketing systems. The main architectural benefit is that governance can run closer to real time, which reduces the chance that access remains valid simply because no one had time to review it. For NHI-related access, automation is especially important because machine identities often outnumber human users and can be distributed across multiple environments.

Practical implication: Use automated discovery and attestation workflows to shorten the time between access change and governance action.

Threat narrative

Attacker objective: The attacker or negligent insider aims to turn lingering access into unauthorized reach across sensitive systems before revocation occurs.

1. Entry through inherited or stale privileges that were never removed after role changes, project completion, or account handoff.
2. Escalation when excessive access is used to reach sensitive systems or administrative functions without additional approval.
3. Impact through unauthorized data exposure, altered records, or persistence of access that should have been revoked earlier.

Breaches seen in the wild

• Cisco DevHub NHI breach — IntelBroker exploited exposed Cisco credentials, API tokens and keys in DevHub.
• Azure Key Vault privilege escalation exposure — Azure Key Vault Contributor role misconfiguration enabled privilege escalation.

Read our 52 NHI Breaches Analysis report for a comprehensive view of breaches impacting Non-Human Identities including AI Agents.

NHI Mgmt Group analysis

User access reviews are a governance control for entitlement drift, not a compliance ritual. The article is right to centre access review on authorization hygiene, but the deeper issue is that identity environments change faster than periodic certification cycles. When access is approved once and then left untouched, governance becomes retrospective paperwork. Practitioners should treat UARs as a control for detecting drift before it becomes exposure.

The same review logic now applies to non-human identities, which often escape human-centric governance workflows. Service accounts, API keys, tokens, and certificates can accumulate privilege without the organizational cues that trigger a human review. That creates a governance gap where the identity exists, the access persists, and ownership is unclear. The field needs access review models that explicitly include NHI inventories and revocation triggers.

Risk-based recertification is the right direction, but only if privilege and reach are measured accurately. A review process cannot prioritize what it cannot see, which means discovery and entitlement mapping have to precede attestation. The practical standard is not more review forms, but better risk segmentation tied to business criticality and blast radius. Teams should design for precision, not volume.

Automation is becoming the only scalable way to keep access review useful in hybrid identity estates. Manual review can still work for small environments, but it breaks down once SaaS sprawl, cloud access, and NHI populations expand. Automation should shorten the distance between change detection and revocation, while keeping human approval where judgment matters. Practitioners should optimize for continuous governance, not annual reconciliation.

From our research:

• 72% of organisations have experienced or suspect they have experienced a breach of non-human identities, 46% confirmed and 26% suspected, according to The 2024 ESG Report: Managing Non-Human Identities.
• Enterprises that have experienced a compromised NHI averaged 2.7 separate incidents in the past 12 months, which shows that identity failure often becomes repeat failure, not a one-off event.
• To connect that risk profile to remediation practice, read NHI Lifecycle Management Guide for the provisioning, rotation, and offboarding controls that reduce entitlement persistence.

What this signals

Entitlement review is now part of NHI governance, not just human IAM. Once organisations accept that service accounts, tokens, and certificates are identities with lasting privilege, review workflows have to expand beyond employee recertification. The governance question shifts from who signed off last quarter to whether the access still matches the workload, which is where lifecycle discipline starts to matter.

With 72% of organisations already experiencing or suspecting an NHI breach, the risk is no longer limited to forgotten human accounts. Access review programmes should be rebuilt around ownership, blast radius, and revocation evidence rather than annual checkbox cadence.

The next programme-level move is to connect access review with discovery and lifecycle controls, using the NHI Lifecycle Management Guide as the operating model. That is how teams move from periodic attestation to continuous governance.

For practitioners

• Map every entitlement to an owner and business purpose Require each access path to have a current owner, a business justification, and a review cadence. If ownership is unknown, treat the entitlement as a governance defect and queue it for remediation before the next certification cycle.
• Prioritise privileged and sensitive access first Segment reviews by blast radius, starting with admin accounts, production systems, third-party access, and identities that can reach regulated data. Use shorter review intervals for those categories and longer cycles only for low-risk access.
• Automate discovery and attestation workflows Connect identity sources, cloud platforms, and ticketing systems so reviewers receive current access data and revocation actions can be tracked end to end. The goal is to reduce review lag and make removal decisions enforceable.
• Extend review scope to non-human identities Include service accounts, API keys, tokens, and certificates in the same governance process as human users. Tie each NHI to a workload, rotation schedule, and offboarding trigger so access does not outlive the system it serves.

Key takeaways

• User access reviews are only effective when they are tied to current ownership, current purpose, and enforceable revocation.
• Risk-based review matters because privileged access and NHI access create the highest blast radius when they are left unchecked.
• Automation should reduce review lag, but governance still depends on discovery, segmentation, and lifecycle discipline.

Key terms

• User Access Review: A user access review is a recurring check that confirms whether an identity still needs the access it has. It compares current privileges with business need, then drives retain or revoke decisions. In mature programmes, it is a governance control tied to evidence, ownership, and remediation.
• Entitlement Drift: Entitlement drift is the slow mismatch between granted access and actual need. It happens when roles change, projects end, or systems evolve faster than governance processes can keep up. In practice, drift creates hidden privilege that raises risk without obvious alerts.
• Non-Human Identity: A non-human identity is any machine-usable identity such as a service account, API key, token, certificate, bot, workload, or AI agent. These identities authenticate systems rather than people, and they often persist across environments, making ownership, rotation, and revocation critical governance tasks.
• Risk-Based Recertification: Risk-based recertification is a review approach that focuses attention on access with the highest potential impact. Instead of treating every entitlement equally, it ranks systems, users, and workflows by sensitivity and privilege. That makes the process more actionable and less noisy for reviewers.

What's in the full article

Clarity Security's full article covers the operational detail this post intentionally leaves for the source:

• Practical guidance on setting review scope, frequency, and stakeholder ownership for a UAR programme.
• A workflow example showing how automation tools can support access discovery, attestation, and tracking.
• The article's operational framing for risk-based reviews across privileged accounts and high-risk user groups.
• The vendor's own example of 10-minute user access reviews and how that fits compliance tracking.

👉 The full Clarity Security post covers review cadence, automation, and risk-based prioritisation.

Deepen your knowledge

User access reviews and entitlement governance are core topics in our NHI Foundation Level course, the industry's only accredited NHI security programme. If you are extending IAM controls to service accounts, tokens, and other machine identities, it is worth exploring.