← NIST CSF 2.0 · PROTECT — Identity, Authentication and Access Control

PR.AA-05 — Access permissions follow least privilege and separation of duties

critical access-controlprivileged-accesssegregation

Requirement

Access permissions, entitlements and authorisations are defined in a policy, managed, enforced and reviewed, and incorporate the principles of least privilege and separation of duties.

What the engine looks for

Every group below must be satisfied — by an affirmative statement, not a plan, a hedge or a denial — for the control to count as covered. A term ending in … matches any word it begins. Supporting terms do not change the verdict — they raise confidence and distinguish a policy that names a mechanism from one that gestures at a category.

Required element 1 — any one of

least privilegeseparation of dutiessegregation of dutiesneed to know

Required element 2 — any one of

reviewenforcedmanagedpolicy

Supporting terms — specificity signals

rbacabacjust-in-timeprivilegedquarterly reviewrecertificationdeny by default

Contradiction markers

Finding any of these outranks coverage — a policy that admits the gap is worse than silence.

everyone has admin no access review

Equivalent controls elsewhere

Matched on shared topics. Satisfying this control usually moves these too.

Framework	Control	Title	Shared topics
ISO 27001	A.5.3	Segregation of duties	segregation access-control
ISO 27001	A.8.2	Privileged access rights	privileged-access access-control
HIPAA	164.308(a)(3)(ii)(A)	Authorisation and supervision (A)	access-control privileged-access
GDPR	Art.5(1)(f)	Integrity and confidentiality	access-control
GDPR	Art.29	Processing under the authority of the controller	access-control
CCPA/CPRA	1798.100(e) & 1798.150	Reasonable security procedures	access-control
SOC 2	CC5.2	Technology general controls	access-control
SOC 2	CC6.1	Logical access provisioning and restriction	access-control