Because NIS2 treats them as part of the security measures that critical entities must be able to show in operation. If access lingers after role changes or contractors leave, or if sensitive access is granted without risk analysis, the organisation cannot convincingly demonstrate control over its identity estate. That weakens both compliance and resilience.
Why access revocation matters under NIS2
NIS2 shifts access revocation from a housekeeping task to evidence of operational security. If accounts remain active after role changes, exits, or contractor end dates, the organisation is carrying avoidable exposure in systems that are supposed to be under controlled access. The practical issue is not only whether access was once approved, but whether it is still justified today.
That is why access revocation has to be timely, traceable, and tied to joiner, mover, and leaver events. If a dormant entitlement can still reach production data or administrative functions, the control gap is visible to auditors and, more importantly, to attackers who often look for exactly that kind of stale access.
Why approval becomes a control, not a formality
NIS2 also raises the bar on how access is granted. Approval is not just a ticket closure step, it is part of showing that sensitive access was assigned after a risk-based decision. For higher-risk privileges, the organisation should be able to explain who approved the access, what business need was accepted, and why the access level was proportionate.
This matters because NIS2 is built around demonstrable security measures, not informal trust. When approval is weak or undocumented, the organisation may still have access functioning technically, but it cannot convincingly show that the access was governed. That is a compliance problem and an operational one, because weak approval often correlates with overbroad privilege.
What NIS2 changes in day-to-day identity operations
The main operational shift is that access review, approval, and revocation have to be treated as part of the entity’s security posture, not just administrative workflow. Control owners need to know which access paths matter most, which approvals require stronger scrutiny, and which revocations must be immediate because the access is privileged or reaches critical systems. In practice, this often means tighter regulatory and audit perspectives on access governance and clearer mapping between business role, entitlement, and control evidence.
For teams building compliance evidence, the question is whether the organisation can show current state as well as historical approval. That usually means retaining proof of who approved access, when it was last reviewed, and how quickly access is removed when the underlying need disappears. A useful starting point is the identity security regulatory map, because it connects access control expectations with NIS2 and related regimes without treating access as a one-time event.
Risk and Threat Considerations
Stale access is attractive because it is often low-noise and hard to notice until after something goes wrong. If contractors, former employees, or moved staff still retain active rights, the organisation has a standing pathway for misuse, accidental overreach, or lateral movement. Weak approval creates a second risk: access may be legitimate on paper but excessive in practice, which expands the blast radius of any compromise.
Failure mechanism: Access is granted without strong risk-based approval, or it is not removed promptly when the business need ends, leaving exploitable permissions in place longer than intended.
Impact: The organisation loses confidence in its identity estate, weakens its ability to demonstrate operational control under NIS2, and increases the chance that a stale or overprivileged account can be abused.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
NIST CSF 2.0, NIST SP 800-53 Rev 5 and CIS Controls v8 set the technical controls, while ISO/IEC 27001:2022 and EU AI Act define the regulatory obligations.
| Framework | Control / Reference | Relevance |
|---|---|---|
| NIST CSF 2.0 | PR.AA-04 — Access Permissions and Authorizations | NIS2 access approval and revocation map to governing who gets access and when it is removed. |
| Recommendation — Define and enforce approval, review, and revocation rules for sensitive access paths. | ||
| NIST SP 800-53 Rev 5 | AC-2 — Account Management | Account lifecycle control supports timely removal of stale access after role changes or departures. |
| Recommendation — Automate account removal and periodic review for inactive or changed users. | ||
| ISO/IEC 27001:2022 | A.5.15 — Access control | NIS2-style access governance depends on controlled granting and revocation of access rights. |
| Recommendation — Apply formal access control rules for approval, restriction, and revocation. | ||
| CIS Controls v8 | CIS-5 — Account Management | Account management directly supports revocation and approval discipline for active access. |
| Recommendation — Maintain current account inventories and remove access promptly when no longer required. | ||
| EU AI Act | Systemic governance of AI | Not selected |
Practitioner Guidance
What to prioritise: Start with privileged accounts, third-party access, and any entitlement that reaches critical or regulated systems. Those are the places where delayed revocation or weak approval creates the most material exposure.
What to verify: Confirm that every high-impact access path has an owner, an approval record, a review cadence, and a defined revocation trigger. If any of those are missing, the control is not operationally credible yet.
Common mistake: Treating access reviews as periodic paperwork while leaving joiner, mover, and leaver handling disconnected from real system changes. Under NIS2, that gap is exactly what turns a nominal process into an evidentiary weakness.
Practitioner takeaway: The control objective is not simply to approve access and later remove it, but to keep the live access state continuously defensible against business need, privilege, and risk.
Related resources from NHI Mgmt Group
- Why does NIS2 make access logging more important for IAM teams?
- Why does NIS2 make separation of duties and accountability more important for access governance?
- How should security teams run access reviews for non-human identities?
- How should security teams govern non-human identities that have persistent access?