Why do dMSAs and gMSAs still create lateral movement risk in Active Directory?

Why This Matters for Security Teams

dMSAs and gMSAs reduce password handling, but they do not eliminate the core AD problem: privileged identity still exists inside shared directory infrastructure. If an attacker reaches the right cryptographic material, they can mint valid access paths without “breaking” the account in a visible way. That makes the control look stronger than it is, especially in environments that treat service accounts as low-risk simply because passwords are rotated automatically.

This matters because lateral movement in Active Directory is usually about trust boundaries, not just credentials. A compromise of one managed account can become a springboard into other systems, domains, or service tiers when delegation, token handling, or group membership is too broad. NHIMG research shows why this keeps surfacing: the Ultimate Guide to NHIs reports that 97% of NHIs carry excessive privileges, which turns “managed” identities into high-value movement paths. Practitioners should also read the Cisco Active Directory credentials breach analysis for how AD credential exposure becomes enterprise-wide reach.

In practice, many security teams discover the movement path only after an endpoint or admin workstation is already being used to pivot through directory trust, rather than through intentional review of service-account blast radius.

How It Works in Practice

dMSAs and gMSAs improve operational hygiene because the directory generates and maintains credentials centrally, but the security model still depends on the secrecy of the root or managed password material and on the trust placed in AD to distribute and validate it. If that protected material is exposed, the attacker does not need to crack individual passwords one by one. They can often derive or request credentials that are valid for multiple managed accounts, then reuse those identities wherever permissions allow.

That is why the lateral movement risk is structural. A managed account is still an account, and an account with service reach usually has privileges that are useful for chaining access. In a typical AD environment, attackers look for:

• Excessive group membership or delegated rights tied to the managed identity
• Access to tier-0 or tier-1 systems from a lower-trust host
• Replication, Kerberos, or delegation paths that let one compromise unlock more credentials
• Shared administrative tooling that trusts the same identity across multiple services

Current guidance from NIST Cybersecurity Framework 2.0 still points teams toward asset-aware access control, continuous monitoring, and least privilege, which is the right lens here. The practical test is whether the identity can be used beyond its intended service boundary if an attacker gets hold of the underlying secret material. NHIMG’s Top 10 NHI Issues shows how service-account sprawl and weak lifecycle control routinely create that condition.

These controls tend to break down when a managed identity is reused across domains, coupled to legacy delegation, or granted admin-equivalent rights to multiple systems because the directory design prioritised convenience over containment.

Common Variations and Edge Cases

Tighter service-account control often increases operational overhead, so organisations have to balance reduced lateral movement risk against the cost of redesigning legacy AD dependencies. That tradeoff is especially visible in environments that still rely on tiered admin models, cross-domain trusts, or applications that cannot tolerate frequent identity changes.

There is no universal standard for handling every dMSA and gMSA scenario yet, but current guidance suggests treating them as high-value infrastructure identities rather than “safer passwords.” In practice, the most common edge cases are:

• Managed accounts that are technically rotated but still inherit broad ACLs
• Service identities used by scheduled tasks, clustering, or backup systems that need persistent reach
• Hybrid environments where AD trust boundaries extend into cloud workloads and identity misalignment widens the blast radius
• Monitoring gaps that miss credential-theft precursors such as unusual directory reads or delegation abuse

For governance, the most useful framing is Zero Trust and verified access intent, not trust in the account type alone. A managed identity should still be constrained by workload scope, host posture, and explicit privilege boundaries. The 52 NHI Breaches Analysis is a useful reminder that managed or automated identities fail when teams assume rotation equals containment. The NIST Cybersecurity Framework 2.0 remains the better operational baseline: reduce standing privilege, validate access paths, and assume that one compromised directory trust can become many.

Related resources from NHI Mgmt Group

• Why do sandboxed NHIs still create lateral movement risk in cloud environments?
• Why do machine and service accounts create persistence risk in Active Directory?
• Why do privileged accounts still create lateral movement risk even when activity is monitored?
• Why do service accounts and workloads still create lateral movement risk in cloud environments?