Accountability should sit with the designated file or data owners for review, while IT remains accountable for administering permissions and maintaining the audit process. That split works because business owners can judge whether access is appropriate, but only IT should make access changes. It creates clearer ownership without handing over security control itself.
Who owns the review, and who actually changes access?
The cleanest operating model is a split one: the business or data owner decides whether access is still justified, while IT or the access administration team keeps control of the permission set itself. That preserves accountability for business use without letting review duties blur into ungoverned changes.
That split matters because a reviewer is judging appropriateness, not performing the system change. If the same person can approve and modify access without a traceable process, the review becomes a paper exercise instead of a control.
For teams managing file access at scale, the review owner should be the person or function that can answer, “Does this role still need this folder, share, or dataset?” The change owner should be the team that can safely revoke, retain, or narrow access after the decision is made.
Why the business owner should review access, but not administer it
File access is usually justified by business purpose, project membership, client responsibility, or operational need. Those facts sit with the file owner or data steward, not with IT. IT can enforce the control, but it cannot reliably judge whether a user still needs access for current work without input from the accountable business owner.
Keeping review and administration separate also reduces conflicts of interest. If the same operational team both validates and changes access, exceptions can linger, stale access can survive, and nobody has a clear line of accountability when something is over-permitted.
This model is strongest when the review happens against a defined inventory of shares, groups, and inherited permissions. The owner confirms business need; IT translates that decision into permission changes and records the result.
What good review governance looks like in practice
A workable process has three things: a named owner for each file set or data domain, a defined review cadence, and an auditable handoff for permission changes. The owner should review exceptions, dormant access, and users whose role has changed, while IT tracks the actual state of permissions and logs the outcome.
Where access is inherited through groups or nested shares, the review should focus on effective access, not just the top-level group membership. That avoids a common failure mode where a user looks low-risk on paper but still reaches sensitive files through indirect rights.
For larger environments, the practical question is not only “who is responsible?” but also “who can prove the review happened?” The answer should be visible in tickets, attestations, or access review records that show the owner’s decision and the admin action that followed.
Risk and Threat Considerations
When review accountability sits in the wrong place, stale access tends to accumulate and excessive permissions become normalised. That creates unnecessary exposure to accidental disclosure, insider misuse, and lateral movement if an account is compromised.
Failure mechanism: Reviews become detached from business context, so access stays in place after a role change, project end, or ownership transfer. If IT is asked to judge entitlement without the business context, or the business owner is allowed to change permissions directly, the control either drifts into guesswork or loses traceability.
Impact: Sensitive files can remain accessible far longer than intended, and organisations lose confidence that access decisions are both justified and enforceable. In practice, that raises breach exposure, audit findings, and the chance that a revoked user still retains reach through an overlooked group or inherited permission.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
NIST SP 800-53 Rev 5 and CIS Controls v8 set the technical controls, while ISO/IEC 27001:2022 defines the regulatory obligations.
| Framework | Control / Reference | Relevance |
|---|---|---|
| NIST SP 800-53 Rev 5 | AC-6 — Least Privilege | Reviewing file access is about limiting unnecessary permissions. |
| AU-6 — Audit Review, Analysis, and Reporting | The process needs review evidence and traceable change records. | |
| AC-2 — Account Management | File access reviews depend on governed accounts and permission lifecycle ownership. | |
| Recommendation — Use AC-6 to remove access that is no longer needed. Use AU-6 to review access evidence and retain an auditable decision trail. Use AC-2 to assign ownership for account and access review actions. | ||
| ISO/IEC 27001:2022 | A.5.15 — Access control | The question is fundamentally about access approval and control ownership. |
| A.5.18 — Access rights | Access rights must be reviewed and adjusted by a controlled process. | |
| Recommendation — Implement A.5.15 to define access ownership and review authority. Apply A.5.18 to recertify access rights and remove unjustified permissions. | ||
| CIS Controls v8 | CIS-6 — Access Control Management | CIS-6 covers managing and reviewing permissions with clear accountability. |
| Recommendation — Use CIS-6 to assign access review ownership and enforce permission changes centrally. | ||
Practitioner Guidance
What to verify: Make sure every file set or data domain has one accountable reviewer and one separate permission administrator. If ownership is unclear, the review program will fail at the first exception because nobody can make the business decision with authority.
What to prioritise: Start with the most sensitive shares, the broadest group memberships, and any repositories where access has not been reviewed after role, project, or vendor changes. Those are the places where inherited permission sprawl usually hides.
Practitioner takeaway: The review function should be accountable to the business, but the control function should remain with IT, because effective governance depends on separating the judgment about need from the act of changing access.
Related resources from NHI Mgmt Group
Deepen Your Knowledge
Reviewed and updated by the NHIMG editorial team on September 26, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org
