Why do access certifications still feel weak even when reviews are completed on time?

Why This Matters for Security Teams

Access certifications feel weak because reviewers are often asked to approve a label, not a risk decision. A role name can hide dozens of entitlements, inherited privileges, and dormant access paths that matter more than the title itself. That gap is especially visible for NHI governance, where identities are machine-driven, highly connected, and often overlooked until after an incident. NHI Mgmt Group notes that Ultimate Guide to NHIs reports 97% of NHIs carry excessive privileges, which explains why on-time reviews can still leave dangerous access in place.

The real problem is that certification workflows usually measure completion, not decision quality. If the evidence presented to approvers is abstract, a reviewer may approve access that looks normal on paper but is materially excessive in practice. That is why access review quality depends on entitlement granularity, privilege depth, and business context, not just a signed-off workflow. Current guidance suggests pairing certification with stronger identity governance and control evidence, as reflected in OWASP Non-Human Identity Top 10 and NIST SP 800-53 Rev 5 Security and Privacy Controls.

In practice, many security teams encounter excessive access only after an audit exception or breach review, rather than through intentional certification design.

How It Works in Practice

Effective certification starts with the evidence package. Reviewers need to see the specific entitlements attached to a service account, API key, workload identity, or human account, plus the systems reached by those privileges and the last known usage. For NHIs, this usually means connecting the review to inventory data, secrets location, rotation status, and service ownership. The goal is to make a decision about effective access, not just assigned role membership. NHI Mgmt Group’s Ultimate Guide to NHIs emphasizes that visibility and lifecycle controls are foundational because access review quality depends on knowing what exists first.

In practice, stronger certifications usually include:

• Entitlement-level listings instead of bundled role labels.
• Privilege depth, such as admin, write, export, or delegate capabilities.
• Last-used signals, ticket references, or service ownership context.
• Expiry and rotation data for secrets and tokens.
• Clear revocation paths for anything not explicitly justified.

For machine identities, this often means reviewers should assess whether the workload still needs the secret, whether the secret is short-lived, and whether the workload identity is bound to a narrow runtime context. That aligns with the direction of least privilege in OWASP Non-Human Identity Top 10 and the control expectations in NIST SP 800-53 Rev 5 Security and Privacy Controls. Certifications become more meaningful when they are driven by evidence from the identity lifecycle, not by static spreadsheets or generic owner attestations. These controls tend to break down in large enterprises with shared service accounts and poor entitlement mapping because reviewers cannot reliably see what the access can actually reach.

Common Variations and Edge Cases

Tighter certification often increases operational overhead, requiring organisations to balance review depth against reviewer fatigue and production urgency. That tradeoff is real, especially when thousands of NHIs or nested entitlements are involved. Best practice is evolving, but there is no universal standard for how much context is enough in every environment.

One common edge case is entitlements inherited through groups, templates, or deployment pipelines. A reviewer may approve the parent role while missing a dangerous child permission that was added later. Another is “quiet” NHIs that rarely trigger usage logs but still retain standing access to sensitive systems. In those cases, access recertification should be paired with drift detection, secret rotation checks, and periodic ownership validation.

For third-party or ephemeral workloads, certification can also be misleading if the access is technically current but operationally stale. A token may still be valid, yet the integration it supports has been retired, cloned, or moved to a different environment. NHI Mgmt Group’s research on the 52 NHI Breaches Analysis shows how often weak visibility and lifecycle gaps turn routine access into exposure. Where identities are highly dynamic, current guidance suggests replacing purely periodic reviews with event-driven checks tied to onboarding, privilege change, rotation failure, and decommissioning.

That approach is strongest in mature programs, but it can be hard to sustain when ownership is unclear or asset inventories are incomplete.

Related resources from NHI Mgmt Group

• When do NHI access reviews create more value than a one-time cleanup?
• How should security teams run access reviews for non-human identities?
• Why do access reviews still leave risk behind even when auditors sign off?
• Why do access reviews fail even when certification campaigns are completed?