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08/07/2026 7:05 pm
TL;DR: Active Directory contains the privilege-bearing accounts, groups, and delegated permissions that can expose an entire domain, while local admin compromise is usually limited to a single machine, according to Paramount Defenses. The practical issue is not just finding admins but understanding effective access, because excessive permissions create hidden escalation paths that conventional reviews often miss.
NHIMG editorial — based on content published by Paramount Defenses: Privileged Access Attack Surface
By the numbers:
- At 85% of all organizations worldwide, the entirety of an organization's building blocks of cyber security i.e. all privileged user and employee accounts and passwords, all computer accounts and all security groups lie inside Active Directory.
Questions worth separating out
Q: What breaks when Active Directory access is reviewed only at the local administrator level?
A: Teams miss the accounts, groups, and delegated rights that can change access across the domain, so privilege reviews understate true blast radius.
Q: Why do delegated permissions in Active Directory create more risk than they appear to?
A: Delegated permissions often look narrow on paper, yet they can control many identities or resources when applied at OU or domain scope.
Q: How can security teams tell whether Active Directory privilege reviews are working?
A: A review is working only if it can explain who has effective control over privileged accounts, groups, and sensitive objects, not just who appears in an admin list.
Practitioner guidance
- Map effective access paths across Active Directory Review nested groups, delegated permissions, and object ACLs to identify who can actually reset passwords, modify memberships, or change ownership on high-value identities and objects.
- Reclassify sensitive directory objects as privileged assets Place AdminSDHolder, replication-related permissions, and service-discovery objects under privileged review so changes to them are treated as access-control events, not routine directory administration.
- Reduce broad delegation on security groups and OU-scoped rights Remove unnecessary write permissions on groups and organisational units that can control many users, computers, or resources at once, then recertify the remaining delegations against business need.
What's in the full article
Paramount Defenses' full article covers the operational detail this post intentionally leaves for the source:
- Specific examples of the top-10 Active Directory targets attackers pursue, including privileged accounts, delegated groups, and high-value objects
- Permission combinations that create escalation paths, such as reset-password rights, write-membership rights, and modify-permissions access
- Object-level scenarios showing how control of AdminSDHolder, replication permissions, or service-discovery objects can expand impact
- The article's full breakdown of why local administrator compromise is usually narrower than compromise of delegated or unrestricted directory access
👉 Read Paramount Defenses' analysis of Active Directory privilege attack surface →
Active Directory privilege exposure: what IAM teams are missing?
Explore further
08/07/2026 7:29 pm
Active Directory effective access is the privilege problem, not local admin sprawl. The article makes clear that the most dangerous paths sit in delegated permissions, privileged groups, and object-level rights inside the directory. That means the real security question is not how many admins exist on endpoints, but who can actually change identity state at domain scope. Practitioners should treat effective access as the governing lens for privilege exposure.
A few things that frame the scale:
- Only 52% of companies can track and audit the data their AI agents access, leaving 48% with a complete blind spot for compliance and breach investigation, according to AI Agents: The New Attack Surface report.
- 80% of organisations report their AI agents have already performed actions beyond their intended scope, including accessing unauthorised systems, inappropriately sharing sensitive data, and revealing access credentials.
A question worth separating out:
Q: Who is accountable when a writable directory object expands access across the domain?
A: Accountability sits with the team that owns directory governance, because writable objects inside Active Directory can become privilege multipliers for many downstream systems. Frameworks that expect clear ownership and least privilege, including NIST Cybersecurity Framework access management practices, require review of who can alter those control points. The answer is not endpoint ownership alone.
👉 Read our full editorial: Active Directory privilege exposure is far wider than local admin risk
