Framework overlap

Does NIST SP 800-171A Rev 3 cover ISO 37301:2021?

You hold NIST SP 800-171A Rev 3 and have been told to do ISO 37301:2021. Here is how much overlaps, control by control.

38% of ISO 37301:2021 you already have

NIST SP 800-171A Rev 3 already covers about 38% of ISO 37301:2021, leaving 26 of 42 controls as genuinely new work.

Already covered 1 Likely covered 15 New work 26

What is genuinely new work

Nothing in NIST SP 800-171A Rev 3 reaches these. This is the list to scope.

4.4
Compliance management system
4.5
Compliance obligations
4.6
Compliance risk assessment
5.1.1
Governing body and top management
5.1.2
Compliance culture
5.1.3
Compliance governance
5.2
Compliance policy
5.3
Roles, responsibilities and authorities
5.3.2
Compliance function
5.3.4
Personnel
6.2
Compliance objectives and planning to achieve them
7.2
Competence
7.2.2
Employment process
7.2.3
Training
7.3
Awareness
7.5
Documented information
7.5.2
Creating and updating documented information
7.5.3
Control of documented information
8.2
Establishing controls and procedures
8.3
Raising concerns
8.4
Investigation processes
9.1.2
Sources of feedback on compliance performance
9.1.3
Development of indicators
9.1.4
Compliance reporting
9.2
Internal audit
9.2.2
Internal audit programme
Show the 16 you already have
6.3
Planning of changes
10.1
Continual improvement
10.2
Nonconformity and corrective action
4.1
Understanding the organization and its context
4.2
Understanding the needs and expectations of interested parties
4.3
Determining the scope of the compliance management system
5.1
Leadership and commitment
6.1
Actions to address risks and opportunities
7.1
Resources
7.4
Communication
8.1
Operational planning and control
9.1
Monitoring, measurement, analysis and evaluation
9.1.5
Record-keeping
9.3
Management review
9.3.2
Management review inputs
9.3.3
Management review results

How this is calculated

Already covered means a mapping runs from a control in NIST SP 800-171A Rev 3 to that control. Likely covered means no direct mapping exists but both frameworks map to the same control in a third standard. New work means neither. We keep those separate rather than adding them into one friendlier number, because blending them would present a two-hop inference as a verified fact.

Coverage is not symmetric. Run it the other way and you will get a different number; both are correct.

From 332,959 cross-framework control mappings across 723 frameworks, 531 of them verified against their source documents. It does not tell you that you are compliant: a mapped control means the two standards ask for the same thing, not that you have done it.

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