Accountability usually spans IAM, PAM, infrastructure, and network teams because the failure sits between those domains. If identity grants access but the network still allows broad internal reach, no single control owns the full risk. Governance should assign responsibility for reachable privilege, not just for credential issuance or policy definition.
Why This Matters for Security Teams
When identity and network controls do not line up, the gap is not theoretical. A service account may be approved in IAM, yet the network still exposes east-west paths that make the resulting reach far broader than intended. NHI Management Group data shows that 97% of NHIs carry excessive privileges, which makes these mismatches especially risky in environments that assume the identity layer alone is sufficient. That assumption breaks down fastest when secrets are reused, long-lived, or embedded in automation.
The accountability problem is real because the control failure spans multiple domains: IAM defines who or what should act, PAM governs elevated access, and network teams shape what can actually be reached. In practice, governance must track reachable privilege, not just entitlement assignment. Zero Trust principles from NIST SP 800-207 Zero Trust Architecture reinforce this point by treating access as continuously evaluated, not implicitly trusted after login.
In practice, many security teams discover this only after lateral movement has already occurred, rather than through intentional privilege design.
How It Works in Practice
Accountability should follow the control point that could have reduced the blast radius. If IAM issued the identity but the network allowed broad internal reach, the network control owner is accountable for exposure boundaries, while IAM remains accountable for the entitlement decision. If PAM did not require approval or session controls for elevated actions, PAM owns that failure. If no one mapped identity-to-network reach, then governance owns the lack of cross-domain assurance.
Operationally, this means building a shared model of reachable privilege. Teams should correlate identity grants with subnet reachability, security groups, firewall rules, service-to-service paths, and privileged session logs. NIST control thinking in NIST SP 800-53 Rev. 5 Security and Privacy Controls is useful here because accountability can be mapped to control families rather than to teams alone.
- Define one owner for entitlement approval, one for reachability enforcement, and one for exception handling.
- Review network paths whenever an NHI gains new privileges, not only during identity reviews.
- Require evidence that least privilege holds across both the identity plane and the transport plane.
NHIMG research on the Ultimate Guide to NHIs highlights why this matters: 90% of IT leaders say properly managing NHIs is essential for a successful zero-trust implementation, yet broad exposure persists when identity and network governance are not aligned. The same guide also shows that only 5.7% of organisations have full visibility into their service accounts, which makes ownership disputes harder to resolve.
These controls tend to break down in hybrid environments with shared subnets, legacy firewalls, and cloud security groups because no single team can see the complete path an identity can reach.
Common Variations and Edge Cases
Tighter accountability often increases operational overhead, requiring organisations to balance faster delivery against stronger cross-domain review. That tradeoff becomes sharper in environments where service accounts are created by CI/CD, network segmentation is managed separately, and infrastructure changes happen daily.
There is no universal standard for assigning blame in every topology, but current guidance suggests treating the last effective control as accountable for the specific gap. If identity was correct but the route remained open, the network team owns the unbounded reach. If a privileged token was issued without scope limits, IAM or PAM owns the overgrant. If neither side maintained a shared inventory, governance owns the process failure.
Edge cases often appear with third-party integrations, inherited cloud architectures, and ephemeral workloads. In those environments, a service can be technically “least privilege” in IAM while still being able to scan or touch large internal segments through permissive network rules. NHIMG’s 52 NHI Breaches Analysis shows that misalignment is frequently discovered after compromise, not during design review. Practitioners should treat that as a governance signal: if teams cannot prove who owns reachable privilege, the control model is incomplete.
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 and CSA MAESTRO address the attack and risk surface, while NIST CSF 2.0, NIST Zero Trust (SP 800-207) and NIST AI RMF set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| NIST CSF 2.0 | PR.AC-4 | Covers access management and least privilege across identity and network boundaries. |
| NIST Zero Trust (SP 800-207) | Section 3.1 | Zero Trust requires continuous evaluation of identity and access paths. |
| OWASP Non-Human Identity Top 10 | NHI-05 | Addresses excessive NHI privilege when reachability exceeds intended scope. |
| CSA MAESTRO | GOV-02 | Agentic governance depends on clear ownership for autonomous workload reach. |
| NIST AI RMF | AI governance needs accountability for system behavior across connected control planes. |
Continuously validate identity, device, and network context before allowing lateral access.
