Start with the control points that can rewrite access for many others, especially privileged groups, AdminSDHolder, the domain root and large OUs. Those objects can turn ordinary permissions into enterprise-wide privilege. Prioritise them before low-impact local admin accounts, because they determine the blast radius of compromise.
What AD privilege reviews should tackle first
In active directory, the first pass should focus on the objects that can rewrite access for many others. That means privileged groups, AdminSDHolder-protected accounts, the domain root, and large OUs with delegated control. If those are wrong, a single mis-scoped permission can become enterprise-wide privilege, so they matter before low-impact local admin accounts.
The practical test is blast radius, not just label severity. An object that governs inheritance, delegation, or group membership can silently amplify access across many systems, while a narrow local privilege only affects one machine or a small set of users.
For that reason, privilege reviews should start at the control points that shape downstream permissions, then work outward to the accounts and groups they influence. That order helps teams find the permissions that actually change the trust model, rather than spending time on edges that do not materially alter enterprise exposure.
Why the highest-value review targets are the ones that change inheritance
Active Directory privilege is rarely just about one account having too much access. The bigger issue is whether a security principal can alter inheritance, group membership, or delegation in a way that propagates access to others. In practice, that is why privileged groups and the domain root deserve early attention: they are control planes, not just objects.
AdminSDHolder is especially important because it can protect or preserve privileges in ways that defeat ordinary review expectations. If a team only checks visible membership and misses the template or inheritance path behind it, they can overlook how protected accounts keep powerful permissions even after normal changes elsewhere.
Large OUs also deserve early review because delegated rights there often apply at scale. A permission that looks routine on a single OU can become a broad administration path when it is inherited by many child objects, so reviewers should treat OU scope as part of the privilege question, not a separate housekeeping detail.
How to separate enterprise-wide privilege from local privilege
The simplest way to triage is to ask whether the object can affect many identities, many systems, or both. Privileged groups, domain-level objects, and broad OUs can change who can administer, reset, or modify other accounts, which makes them high-priority control points. Local admin accounts usually matter later because their impact is narrower and easier to contain.
This is also where scope and delegation matter more than raw count. A small number of rights on the wrong object can be more dangerous than many rights on a well-contained endpoint, because control over the wrong directory object can be reused to create new privileged paths.
Reviews should therefore trace from the object to the effective power it creates: who can change membership, who can change inheritance, who can reset critical credentials, and who can modify the permissions that govern others. That is the layer where AD privilege becomes an enterprise issue rather than a single-account issue.
Risk and Threat Considerations
Weaknesses in these top-tier control points create disproportionate exposure because they let an attacker or insider expand access beyond the original foothold. If a privileged group, AdminSDHolder path, or broad OU is misconfigured, compromise can turn into rapid privilege amplification and persistence.
Failure mechanism: A low-level permission on a high-impact directory object can be used to change membership, alter inheritance, or rewrite delegated access, which then propagates privilege across many users and systems.
Impact: The result can be enterprise-wide administrative reach, harder remediation, and a much larger blast radius than the original account or workstation would suggest.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
CIS Controls v8 and NIST SP 800-53 Rev 5 set the technical controls, while ISO/IEC 27001:2022 defines the regulatory obligations.
| Framework | Control / Reference | Relevance |
|---|---|---|
| CIS Controls v8 | CIS-5 — Account Management | AD privilege reviews focus on account and group control paths that govern access changes. |
| Recommendation — Review and remove excessive directory privileges before they expand across shared administration paths. | ||
| NIST SP 800-53 Rev 5 | AC-6 — Least Privilege | The question is about prioritising the permissions that create the largest privilege blast radius. |
| AC-2 — Account Management | Privileged group membership and protected accounts are central to AD review prioritisation. | |
| Recommendation — Prioritise least-privilege remediation on directory objects that can rewrite downstream access. Validate privileged account and group governance before reviewing lower-impact local admin accounts. | ||
| ISO/IEC 27001:2022 | A.5.15 — Access control | AD privilege review is fundamentally about governing who can access and modify directory-controlled resources. |
| A.8.2 — Privileged access rights | The subject is specifically about which privileged AD rights should be reviewed first. | |
| Recommendation — Map directory control points to access-control owners and review them first. Focus privileged-access reviews on objects that can propagate administrative power. | ||
Practitioner Guidance
What to prioritise: Start with objects that can influence many others, then validate the effective rights behind them. If a permission can change group membership, inheritance, or delegation on a core directory object, treat it as a review priority before endpoint-local admin sprawl.
What to verify: Confirm the actual control path, not just the visible ACL. Review whether protected groups, AdminSDHolder, the domain root, and delegated OUs have rights that allow privilege propagation, and check whether those rights are still required by the owning team.
Common mistake: Teams often spend too much time on obvious but low-blast-radius admin accounts and too little time on the objects that define who can become admin in the first place.
Practitioner takeaway: In AD privilege reviews, first secure the objects that can reshape other permissions, because that is where one misconfiguration becomes a platform-wide privilege problem.
Related resources from NHI Mgmt Group
- How should security teams govern Active Directory service accounts?
- What should security teams do first when Active Directory privilege escalation flaws could let attackers take over a Windows domain?
- What should security teams do first to validate whether NTLM-based privilege escalation paths are reachable in their Active Directory environment?
- How should IAM teams align Active Directory reviews with SOX, HIPAA, and ISO 27001?