Treat service accounts, API keys, tokens, and certificates as exposure assets that must move through the same lifecycle as other high-risk resources. That means assigning ownership, enforcing rotation or offboarding, and confirming that privilege is removed after the exposure is remediated. Otherwise NHI risks remain outside the control loop.
Why This Matters for Security Teams
CTEM is most effective when it continuously turns visibility into action, and that only works if non-human identities are included in the exposure model. Service accounts, API keys, tokens, and certificates often sit outside traditional asset inventories, so they escape the same prioritisation logic applied to hosts, containers, and applications. That creates a gap between what is visible in assessment and what is actually exploitable in production. Aligning CTEM with nhi governance closes that gap by making ownership, privilege, and lifecycle state part of the remediation decision.
This matters because NHIs are rarely static. They are created for automation, temporary integrations, vendor access, CI/CD, and agentic workflows, then left in place long after the original business need has changed. Under NIST Cybersecurity Framework 2.0, governance and risk management should inform ongoing protection decisions, not just annual reviews. The practical question is whether exposure management can identify which secrets, credentials, and trust relationships are still active, which are overprivileged, and which can be safely revoked.
In practice, many security teams encounter NHI exposure only after a secret has been reused, overexposed, or left active long after remediation should have happened, rather than through intentional exposure management.
How It Works in Practice
Operationally, CTEM should treat NHI governance as a first-class input to each exposure cycle. That starts with discovery: identify service accounts, machine identities, API tokens, certificates, and signing keys across cloud, SaaS, CI/CD, and developer tooling. Then enrich each item with business owner, technical owner, privilege scope, expiry, last use, and dependency mapping. Without that context, exposure scoring can look accurate while still missing the real blast radius.
Next, combine attack surface evidence with governance controls. For example, a secret with broad write access and no expiry should score higher than a short-lived credential bound to a single workload. If a token is detected in a repository, CTEM should not stop at finding it. The workflow should confirm whether the credential was rotated, whether dependent automation was updated, and whether the old secret was invalidated. This is where NHI governance turns findings into measurable reduction in exposure.
- Use a complete inventory that includes service accounts, secrets, and certificates, not just human users and endpoints.
- Attach ownership and business criticality so remediation can be assigned and tracked.
- Prioritise NHIs with excessive privilege, missing expiry, weak attestation, or external exposure.
- Validate that rotation or revocation actually removed access, rather than assuming the ticket closed the risk.
- Feed remediation results back into exposure scoring so repeated failures surface as systemic control gaps.
For control design, the identity and access lifecycle should be aligned to the same governance cadence used for other exposures, with review, remediation, and verification tied together. Current guidance suggests that teams should also map secrets management, just-in-time access, and certificate renewal to a formal risk acceptance process so exceptions are visible and time bound. Where CTEM tooling can integrate with detection and response, remediation can be verified through event logs, secret scanners, and privilege telemetry rather than manual attestations alone. The CISA Known Exploited Vulnerabilities Catalog is useful as a model for prioritising by real-world exposure, even though NHIs require a different asset class and workflow.
These controls tend to break down when secrets are spread across legacy systems, unmanaged pipelines, and third-party integrations because ownership and revocation are difficult to verify end to end.
Common Variations and Edge Cases
Tighter NHI governance often increases operational overhead, requiring organisations to balance faster automation against stronger control over privilege and revocation. That tradeoff becomes more pronounced in environments with ephemeral workloads, multi-cloud deployments, or distributed development teams, where the pace of change can outstrip manual review. Best practice is evolving here, and there is no universal standard for how often every NHI should be revalidated.
One common edge case is shared service accounts used by multiple applications. They may be easy to discover but hard to govern because ownership is diffuse and revocation can cause outages. Another is long-lived certificates in embedded or industrial environments, where rotation may need maintenance windows and dependency testing. In these cases, CTEM should still treat the identity as an exposure asset, but remediation may need compensating controls such as network restriction, tighter monitoring, or staged rotation.
The clearest intersection with NHI governance appears when organisations use secret sprawl as a proxy for progress. A reduced count of exposed credentials does not necessarily mean lower risk if the remaining NHIs are highly privileged or poorly attributable. The MITRE ATLAS model is useful where AI agents or automation pipelines rely on NHIs, because compromise of those identities can enable prompt injection, tool abuse, or downstream data manipulation. For exposure programs, the goal is not just fewer findings, but verifiable reduction in the reach and duration of machine privilege.
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 Zero Trust (SP 800-207) set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| NIST CSF 2.0 | GV.OC-01 | CTEM needs clear ownership and business context for NHI exposure decisions. |
| OWASP Non-Human Identity Top 10 | NHI lifecycle, ownership, and secret sprawl are central to this FAQ question. | |
| NIST Zero Trust (SP 800-207) | 5.3 | Zero trust reinforces continuous verification of machine identity and privilege. |
Continuously verify NHI trust and scope before allowing access to sensitive resources.
