CIEM vs IAM vs PAM: why cloud entitlements need a separate layer

At a glance

What this is: Orca Security argues that IAM, PAM, and CIEM solve different access problems, with CIEM providing the cloud-native entitlement layer IAM and PAM were never designed to cover.

Why it matters: Identity teams need to separate authentication, privilege containment, and entitlement right-sizing so cloud access reviews, machine identity governance, and least-privilege controls do not collapse into one undifferentiated process.

👉 Read Orca Security's analysis of CIEM vs IAM vs PAM in cloud security

Context

CIEM is cloud infrastructure entitlement management, the layer that calculates what identities can actually do after roles, policies, trust relationships, and inherited permissions are combined. The problem is not access in the abstract but effective access at cloud scale, where entitlement sprawl can outgrow the controls that were built for named users and password-based administration.

IAM and PAM remain necessary, but they were shaped around human login flows and privileged sessions rather than the cloud’s mix of service accounts, workload identities, and cross-account role assumption. For teams trying to govern non-human identities, the operational question is whether access is merely granted or materially exploitable, and that distinction is where CIEM matters.

Key questions

Q: How should security teams govern cloud entitlements for non-human identities?

A: Security teams should govern cloud entitlements by computing effective permissions, not just reviewing assigned roles. That means treating service accounts, workload identities, and CI/CD roles as first-class identities, then removing unused access, risky trust paths, and cross-account privileges that expand blast radius. CIEM is the layer that makes that analysis practical across clouds.

Q: Why do IAM and PAM leave cloud permission gaps?

A: IAM and PAM were designed around authentication and privileged session control, not the full entitlement graph created by cloud policies. They can confirm who logged in and protect elevated sessions, but they do not reliably show what a role can reach after inheritance, trust relationships, and group-based access are resolved. That is why over-permissioned identities remain hidden.

Q: What breaks when cloud teams rely on IAM alone?

A: Relying on IAM alone leaves teams blind to effective access and permission drift. A role can be assigned correctly yet still accumulate excessive permissions through inheritance, shared policies, or stale trust relationships. In cloud environments, that means a seemingly ordinary identity can reach sensitive data or administrative functions without a corresponding governance signal.

Q: Who should own CIEM in a mature identity programme?

A: CIEM should be owned jointly by cloud security, IAM, and identity governance teams because it sits between provisioning, privilege management, and entitlement reduction. The objective is not to replace existing controls but to reconcile them against actual cloud access so that account lifecycle, privileged access, and machine identity governance all share one entitlement picture.

Technical breakdown

Effective permissions in cloud identity governance

Cloud entitlement management matters because the permission a role is assigned is not always the permission it ends up having. Effective permissions are the real result after direct grants, inherited roles, group memberships, resource policies, and trust relationships resolve across accounts and services. That is why a role that looks ordinary in IAM can still reach data or administrative functions it never obviously requested. CIEM exists to compute that final access picture, then compare it to actual use and least-privilege expectations. In a multi-cloud estate, this becomes the only practical way to see over-permissioned human and machine identities together.

Practical implication: teams need continuous entitlement analysis, not periodic review of raw role assignments.

Why IAM misses non-human identities

IAM authenticates identities and assigns access, but it usually does not measure whether that access is excessive once cloud policies combine. The gap gets larger with service accounts, CI/CD roles, functions, and workload identities because these non-human identities often authenticate through keys or tokens and can accumulate permissions without a normal user lifecycle. In practice, IAM can show that an entitlement was granted correctly while remaining blind to whether the entitlement now creates unnecessary blast radius. That is the governance gap CIEM is meant to expose, especially where machine identities outnumber humans.

Practical implication: map non-human identities separately so you can right-size cloud permissions without relying on human-centric IAM assumptions.

PAM protects privilege, but not cloud entitlement sprawl

Privileged Access Management controls how elevated access is used, usually by vaulting credentials, brokering sessions, and recording activity. That works well when privilege is tied to a sessionable human account, but it does not enumerate every cloud role or service identity that can become effectively privileged without a password ever being checked out. CIEM fills that gap by finding where privilege already exists in the cloud plane, even when PAM never sees a login event. The two controls are complementary because one governs privileged use and the other governs privileged exposure.

Practical implication: use PAM for privileged session control and CIEM for entitlement reduction, then reconcile the two views in one access programme.

Threat narrative

Attacker objective: The attacker objective is to exploit excessive cloud entitlements to move from ordinary access into data exposure, privilege escalation, or cross-account control.

1. Entry begins when an identity is provisioned with more cloud access than it actually needs, often through role inheritance or cross-account trust.
2. Escalation follows when unused or hidden entitlements allow that identity to reach administrative actions, sensitive data, or lateral trust paths.
3. Impact occurs when over-permissioned human or machine access expands blast radius, making a compromise or misuse far more damaging than the original account would suggest.

Breaches seen in the wild

• Azure Key Vault privilege escalation exposure — Azure Key Vault Contributor role misconfiguration enabled privilege escalation.
• Codefinger AWS S3 ransomware attack — Codefinger used compromised AWS credentials to encrypt S3 buckets via SSE-C.

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

NHI Mgmt Group analysis

CIEM is the cloud-native entitlement layer that IAM and PAM were never built to provide. IAM governs who can authenticate and PAM governs how privileged sessions are used, but neither can reliably compute effective permissions across multi-cloud estates. That leaves service accounts, workload identities, and inherited role chains outside the centre of gravity. The implication is that cloud identity governance must be measured by effective access, not by the account model alone.

Human-centric access models break down when machine identities outnumber people. IAM and PAM were designed in a world where named users and vaulted administrator sessions were the dominant security object. Cloud environments invert that assumption, because non-human identities are continuously created, delegated, and reused across pipelines, functions, and services. A programme that treats those identities as secondary will miss the entitlements that most expand attack paths.

Effective permission drift is the named concept this article exposes. The issue is not simply that identities have access, but that their real access drifts away from the intent established at provisioning time. That drift is produced by inheritance, trust relationships, and stale entitlements that survive long after the business need fades. Practitioners should read cloud governance through the lens of permission drift, because that is where least privilege quietly fails.

CIEM complements, rather than replaces, access governance disciplines such as IGA and PAM. IAM establishes lifecycle controls, PAM reduces standing privilege, and CIEM continuously measures entitlement reality across clouds. The strongest programmes do not treat these as competing categories. They use each layer for the problem it can actually see, then reconcile them around the same identity inventory.

Cloud identity security is moving toward entitlement-first governance. The practical shift is from asking whether an identity can log in to asking what it can effectively reach, assume, or execute after policy resolution. That is a broader operating model for identity teams, and it aligns cloud access decisions with the attack paths they create. Practitioners should expect entitlement visibility to become a core control, not an optional add-on.

From our research:

• 70% of organisations grant AI systems more access than they would give a human employee performing the exact same job, according to the 2026 Infrastructure Identity Survey.
• A separate 2024 NHI survey found that 35.6% of organisations cite consistent access across hybrid and multi-cloud environments as their top non-human identity challenge.
• That same survey showed only 19.6% of security professionals express strong confidence in their ability to securely manage non-human workload identities, underscoring the need to move entitlement governance forward.

What this signals

Effective permission drift: cloud programmes need a way to measure what identities can actually do after policy resolution, not just what they were assigned at creation. That shift becomes more urgent as machine identities multiply and cloud estates span multiple control planes, because the entitlement picture changes faster than periodic review cycles can track.

With 70% of organisations already granting AI systems more access than human employees performing the same job, per the 2026 Infrastructure Identity Survey, entitlement governance is no longer a niche cloud problem. It is a programme design issue that affects IAM, PAM, and workload identity controls together.

Teams should expect access review processes to become less useful unless they are tied to effective permissions analysis and cloud attack-path context. That is where entitlement management, lifecycle governance, and privileged access oversight begin to converge into one operating model rather than separate audits.

For practitioners

• Separate entitlement review from access provisioning Review effective permissions independently of joiner-mover-leaver workflows so cloud roles, inherited policies, and trust paths are assessed after they combine, not only when they are assigned.
• Inventory non-human identities as first-class subjects Build a distinct register for service accounts, CI/CD roles, workload identities, and functions, then classify which of those identities can assume additional roles or reach sensitive resources.
• Reconcile PAM coverage with cloud role reality Compare vaulted privileged accounts against cloud identities that can perform equivalent actions without a password or session checkout, then close the gaps where PAM has no visibility.
• Prioritise least-privilege by attack path, not by role count Reduce the permissions that connect everyday identities to production data, admin roles, or cross-account trust first, because those paths create the largest blast radius.

Key takeaways

• IAM, PAM, and CIEM solve different parts of access governance, and confusing them leaves cloud entitlements unmanaged.
• The most important gap in cloud identity security is effective permission drift across human and non-human identities.
• Practitioners should pair identity lifecycle controls with entitlement analysis so least privilege is measured in real cloud behaviour, not in policy intent alone.

Key terms

• Cloud Infrastructure Entitlement Management: CIEM is the discipline focused on discovering, analyzing, and reducing the permissions identities actually hold in cloud environments. It goes beyond account provisioning to calculate effective access across roles, policies, inheritance, and trust relationships, then helps teams remove excess entitlement before it becomes attack surface.
• Effective permissions: Effective permissions are the real actions an identity can perform after all cloud policies, inherited roles, group memberships, and trust paths are resolved. They often differ from the permissions shown on a single role assignment, which is why entitlement review must look at how access combines in practice.
• Non-human identity: A non-human identity is any machine, workload, service account, token, certificate, or automation account that authenticates and acts without a person at the keyboard. In cloud environments, these identities are often the hardest to inventory because they are numerous, dynamic, and easy to over-permission.
• Privilege containment: Privilege containment is the practice of limiting how much elevated access exists and how long it remains usable. PAM is the control family most associated with it, but in cloud programmes the same goal must extend to roles and service identities that cannot be protected by vaulting alone.

What's in the full article

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

• The side-by-side mechanics of IAM, PAM, and CIEM across cloud environments and account models.
• The practical differences between authentication, privileged session control, and effective permission analysis.
• The related acronym map for PIM, IGA, CSPM, SIEM, and ITDR in cloud identity programmes.
• The specific scenarios where CIEM exposes over-permissioned human and machine identities that other controls miss.

👉 Orca Security's full article covers the CIEM mechanics, related acronyms, and cloud access scenarios in more detail.

Deepen your knowledge

NHI governance, agentic AI identity, and machine identity security are core topics in our NHI Foundation Level course, the industry's only accredited NHI security programme. If you are responsible for identity security strategy or NHI governance in your organisation, it is worth exploring.