They should classify any system that can change identity, infrastructure, or policy as Tier 0, even if it sits outside the original Microsoft model. That usually includes cloud consoles, identity providers, SaaS admin portals, and orchestration systems. The goal is to govern control-plane power, not to preserve old architecture labels.
Why This Matters for Security Teams
Tiering cloud and SaaS administrative access is really about protecting control planes, not preserving legacy labels from an on-premises model. If an account can change identity policy, issue tokens, alter infrastructure, or modify tenant-wide settings, it belongs in the highest trust tier because compromise there quickly becomes organisation-wide impact. The operating assumption should be that admin portals, IdPs, CI/CD systems, and orchestration layers are blast-radius amplifiers.
This is where teams often underestimate risk. The Ultimate Guide to NHIs notes that NHI governance breaks down when access is treated as a static entitlement problem rather than a control-plane problem. That distinction matters because cloud and SaaS admins rarely stay inside a neat perimeter, and their permissions frequently span identity, secrets, data, and automation. The NIST Cybersecurity Framework 2.0 reinforces that governance and access control must be tied to business risk, not just system category.
In practice, many security teams discover the true tier-0 surface only after a SaaS admin token, cloud role, or automation credential has already been used to change policy or widen access.
How It Works in Practice
Effective tiering starts by inventorying every administrative pathway that can affect the control plane. That includes cloud consoles, identity providers, SaaS admin portals, security tools, backup platforms, infrastructure-as-code runners, and any automation that can create or elevate identities. Once identified, classify each pathway by what it can change, not by where it lives. A tenant-wide SSO admin, for example, is Tier 0 even if the vendor markets it as “business admin.”
Operationally, teams should combine tiering with strong guardrails: separate admin identities from daily-use accounts, enforce phishing-resistant MFA, require just-in-time elevation for human admins, and treat long-lived secrets as an exception rather than a norm. Where possible, move privileged workflows toward workload identity and short-lived credentials so access expires when the task ends. For NHI and automation-heavy environments, the relevant question is whether the identity can alter policy or expand trust, not whether a human can log into it directly.
That approach aligns with the OWASP Non-Human Identity Top 10, which highlights insecure secrets, over-privilege, and weak lifecycle controls as recurring failure patterns. NHIMG research also shows why this matters: the 2024 Non-Human Identity Security Report found that 88.5% of organisations say their non-human IAM practices lag behind or merely match human IAM. That gap is especially dangerous in cloud and SaaS control planes because privilege changes propagate fast and are hard to unwind.
These controls tend to break down in highly federated environments where multiple business units manage their own SaaS tenants and cloud subscriptions because ownership, logging, and revocation paths become inconsistent.
Common Variations and Edge Cases
Tighter tiering often increases friction for platform teams, so organisations have to balance operational speed against the blast radius of privileged access. The tradeoff becomes sharper in DevOps and SaaS-heavy environments where admins also automate deployments, manage integrations, and respond to incidents.
One common edge case is the “business admin” role inside a SaaS platform. It may appear scoped, but if it can reset authentication, alter retention, create integrations, or grant delegated access, it should be treated as Tier 0 or very close to it. Another edge case is emergency access: break-glass accounts may be necessary, but they still need separate storage, strict logging, and rapid revocation procedures. There is no universal standard for every vendor’s role model, so current guidance suggests mapping privileges to impact, then validating with real abuse-case testing.
The same logic applies to automation accounts. If an infrastructure pipeline or AI agent can deploy code, rotate secrets, or change network policy, it inherits the sensitivity of the action it can perform. That is consistent with emerging guidance in the NIST AI 600-1 GenAI Profile and the NIST IR 8596 Cyber AI Profile, both of which emphasise managing AI-enabled change with explicit governance and monitoring. In practice, tiering fails when organisations exempt “trusted” automation from the same control-plane rules they apply to humans.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
OWASP Non-Human Identity Top 10, OWASP Agentic AI Top 10 and CSA MAESTRO address the attack and risk surface, while NIST CSF 2.0 and NIST AI RMF set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-01 | Tiering privileged cloud and SaaS access depends on finding and classifying high-risk NHIs. |
| NIST CSF 2.0 | PR.AC-4 | Least-privilege access control is central to separating admin tiers by blast radius. |
| NIST AI RMF | AI RMF governance applies when automation or AI agents can alter cloud and SaaS controls. | |
| OWASP Agentic AI Top 10 | A01 | Agentic systems with admin authority need controls for unpredictable tool use and privilege escalation. |
| CSA MAESTRO | MAESTRO addresses secure orchestration of agentic and cloud automation with strong governance. |
Inventory all admin NHIs and label any identity that can change policy, identity, or infrastructure as Tier 0.
Related resources from NHI Mgmt Group
- How should security teams prioritise NHI remediation in cloud environments?
- How should security teams run access reviews for non-human identities?
- How should security teams govern non-human identities that have persistent access?
- How should security teams govern non-human identities in cloud environments?
Deepen Your Knowledge
Reviewed and updated by the NHIMG editorial team on August 17, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org