Who is accountable when lateral movement succeeds through approved access paths?

Why This Matters for Security Teams

When lateral movement succeeds through approved access paths, the failure is rarely a single technical control. It is usually an identity governance gap: an entitlement was granted, left in place, or not reviewed after the original business need changed. That is why accountability sits with the teams that own access decisions, not only the tooling that logs the traversal. Guidance from the OWASP Non-Human Identity Top 10 and NHI Management Group’s Ultimate Guide to NHIs both point to the same operational reality: approved access is still attack surface. In mature programs, detection and response are necessary, but they do not replace entitlement ownership, application ownership, and offboarding discipline.

The practical risk is that “approved” often gets treated as “safe,” even when the approval is stale, overbroad, or no longer tied to a live business requirement. That is especially dangerous for NHI and service account paths, where privileges can persist far longer than humans expect. NHI Mgmt Group reports that 97% of NHIs carry excessive privileges, which helps explain why attackers often succeed without needing to break in through a noisy exploit path. In practice, many security teams encounter lateral movement only after the approved path has already been used repeatedly, rather than through intentional review of entitlement drift.

How It Works in Practice

Accountability follows control ownership. If a service account, API key, role assignment, or delegated token was used to move laterally, the teams that approved and maintained that access are part of the breach-control chain. Security operations may detect the anomalous movement, but identity governance decides whether the path should have existed at all. The most effective programs map each approved path to an owner, a business justification, a review cadence, and a revocation trigger.

In practice, that means:

• Access reviews must validate current necessity, not just historical approval.
• Application owners must confirm which service accounts, tokens, and roles are still required.
• Identity teams must remove orphaned entitlements and enforce offboarding for machines as strictly as for people.
• Security teams must correlate approved paths with actual usage to identify privilege creep and hidden trust chains.

This is why the issue appears in NHI governance as much as in incident response. The 52 NHI Breaches Analysis shows how compromised non-human identities repeatedly become the path of least resistance, while the OWASP guidance highlights that over-permissioned identities and weak lifecycle controls are recurring patterns. Current guidance suggests treating approved access as conditional, time-bound, and continuously revalidated rather than permanently trusted.

For organisations with shared admin models, inherited roles, or fragmented ownership across platforms, the chain of accountability can blur quickly. That ambiguity is itself a control failure. These controls tend to break down when identity ownership is split across security, application, and infrastructure teams because no single group can prove who approved, retained, or failed to revoke the access path.

Common Variations and Edge Cases

Tighter access governance often increases operational overhead, requiring organisations to balance rapid delivery against stronger entitlement discipline. That tradeoff is real, especially where automation, DevOps, and service-to-service communication depend on frequent short-lived access.

There is no universal standard for assigning blame after lateral movement, but the accountability model is usually shaped by who owned the decision to grant and retain access. If a cloud role was inherited from a template, the platform team may own the control design, while the application team owns the business justification, and the identity team owns the review process. For NHIs, that split matters even more because access often persists outside normal employee lifecycle workflows.

The hard cases are shared service accounts, emergency access, and outsourced operations. In those environments, a single approval can cover multiple systems, so post-incident review must examine whether the access was necessary, whether it was bounded, and whether it was revoked on time. NHI Mgmt Group notes in the Ultimate Guide to NHIs — Key Challenges and Risks that visibility and lifecycle gaps are still common, which makes ownership even more important. The current best practice is evolving toward explicit ownership tags, JIT access, and policy-based review of every approved path, rather than relying on periodic audits alone.

Related resources from NHI Mgmt Group

• Who is accountable when an access request is approved through a ticket but later turns out to be inappropriate?
• Who is accountable when identity-based attacks move through trusted access paths?
• How should security teams run access reviews for non-human identities?
• How should security teams govern non-human identities that have persistent access?