Accountability should sit with the system owner, the identity governance team, and the control owners for PAM and access review, because no single process fixes orphaned access on its own. If ownership cannot be established quickly, the account should be isolated, investigated, and moved into the remediation workflow before exposure expands.
Why This Matters for Security Teams
An over-privileged account with no clear owner is not just an administrative gap. It is a control failure that can turn into lateral movement, data exposure, or persistent access that survives normal review cycles. Guidance from the OWASP Non-Human Identity Top 10 treats excessive privilege and poor ownership as core NHI risks, and NHI Mgmt Group data shows that 97% of NHIs carry excessive privileges. When no one owns the account, accountability has to be assigned through the control plane, not guessed after the fact.
That matters because orphaned access usually spans multiple teams: the application owner, the identity governance function, and the PAM or access review control owner may each have partial responsibility, but none of them can safely assume the others will act first. The right response is to identify the authoritative system of record, isolate the account if ownership cannot be proven quickly, and force remediation into a tracked workflow. In practice, many security teams encounter orphaned over-privileged access only after an audit finding or incident response event has already exposed the gap.
How It Works in Practice
Accountability is established by combining ownership evidence, technical containment, and a documented remediation path. Start by determining whether the account belongs to an application, integration, service, workload, or legacy process. Then trace the last known owner through CMDB records, IAM logs, vault records, CI/CD pipelines, ticket history, and the NHI Lifecycle Management Guide. If the owner is identifiable, the system owner becomes accountable for business justification, while the identity governance team owns the control action and the PAM team owns containment.
For operational handling, a practical sequence is:
- Freeze or quarantine the account if it has broad access or unclear use.
- Confirm whether the credential is still active in code, secrets stores, scripts, or automation jobs.
- Assign a temporary accountable owner if the original owner cannot be verified.
- Document the business service, privilege scope, and expiry date.
- Reduce access to the minimum required, then rotate or revoke the secret.
This is where access review discipline matters. The review owner should not merely record “owner unknown”; they should route the exception into a remediation queue with an SLA, evidence requirements, and escalation path. The Top 10 NHI Issues research is useful here because it frames ownership and rotation as recurring governance failures rather than one-off exceptions. Current guidance suggests that accountability must be explicit, time-bound, and tied to a named control owner, because shared responsibility without a named decision-maker usually means no one acts. These controls tend to break down in decentralised engineering environments where service accounts are created by pipelines faster than governance can inventory them.
Common Variations and Edge Cases
Tighter ownership controls often increase operational overhead, requiring organisations to balance security gains against delivery speed, especially in environments with many ephemeral services. A missing owner is not always proof of negligence; sometimes the account belongs to a retired system, a merged business unit, or an integration that outlived its documentation. In those cases, best practice is evolving, but the safest position is to treat the account as unowned until evidence proves otherwise.
Edge cases include shared service accounts, vendor-managed integrations, and inherited identities from acquisitions. Shared accounts should have a single accountable owner even if multiple teams use them. Vendor-managed access still needs an internal owner who can approve, review, and revoke. For inherited estates, the remediation path should include a dedicated cleanup sprint, not a permanent exception. The underlying pattern is consistent: if no one can explain why the access exists, the control owners should assume the privilege is unjustified until validated against source records and runtime use.
NHI Mgmt Group notes that only 20% of organisations have formal processes for offboarding and revoking API keys, which is why orphaned access often persists longer than teams expect. The operational goal is not only to find an owner, but to make ownership undeniable before the next access review cycle.
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 address the attack and risk surface, while NIST CSF 2.0 and NIST CSF 2.0 set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-03 | Excessive privilege and weak ownership are direct NHI risk drivers. |
| NIST CSF 2.0 | PR.AC-4 | Access permissions must be managed and reviewed continuously. |
| NIST CSF 2.0 | ID.GV-1 | Governance must define accountability for identity control decisions. |
Assign a named owner, then reduce or revoke over-privileged access with tracked remediation.
