NIST SP 800-171
NIST Special Publication 800-171 Revision 3 — Protecting Controlled Unclassified Information in Nonfederal Systems and Organizations
Standard Introduction
NIST SP 800-171 is an active standard published by National Institute of Standards and Technology (NIST). It is commonly used across Government, Aerospace & Defense, Manufacturing, Technology and applies in United States.
Use this page to review the official documentation, current status, and the certification or assessment bodies most commonly associated with NIST SP 800-171.
Implementation Roadmap
Define controlled unclassified information protection scope
Identify the products, services, systems, entities, jurisdictions, teams, vendors, data flows, and stakeholders covered by NIST SP 800-171 Rev. 3. Confirm owners, boundaries, applicable obligations, documentation, and evidence expectations for CUI boundaries, system components, 17 security requirement families, organizationally defined parameters, access control, awareness, audit, configuration, identification, incident response, maintenance, media protection, personnel security, physical protection, risk assessment, security assessment, system and communications protection, and system integrity.
Assess obligations and gaps
Compare current practices with the expected controlled unclassified information protection approach. Review CUI scoping, system security plan, requirement implementation, POA&M governance, access control, MFA, logging, configuration baselines, vulnerability management, incident response, media protection, supplier controls, security assessment, and continuous monitoring, then prioritize gaps by legal exposure, user or safety impact, customer commitments, operational dependency, reporting deadlines, and assurance readiness.
Implement controls and evidence
Deploy required procedures, technical controls, review gates, training, supplier workflows, reporting paths, and operational records. Maintain SSP, CUI data-flow diagrams, asset inventories, control implementation statements, POA&Ms, access reviews, audit logs, configuration records, vulnerability scans, incident records, training evidence, supplier files, and assessment results as traceable evidence.
Review, report, and improve
Run management reviews, internal checks, technical testing or independent assessments where applicable, corrective actions, and change reviews. Refresh the program when products, vendors, laws, incidents, reporting cycles, or stakeholder expectations change.
Compliance Checklist
checklist Scope and accountability
checklist Controls and records
checklist Monitoring and assurance
Frequently Asked Questions
Who needs NIST SP 800-171 Rev. 3?
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NIST SP 800-171 Rev. 3 is most relevant to nonfederal organizations, contractors, suppliers, and service providers that process, store, transmit, or protect CUI for federal agencies. The exact scope depends on products, services, jurisdictions, reporting duties, customer commitments, technical requirements, and the organization's role in the relevant ecosystem.
Is NIST SP 800-171 Rev. 3 certifiable?
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NIST SP 800-171 is a security requirements publication, not a certification. It is commonly enforced through contracts, agency requirements, and assessment programs such as CMMC in the defense ecosystem.
What should implementation focus on first?
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Start by defining scope, obligations, accountable owners, and the evidence expected by regulators, customers, auditors, assurance providers, or governance bodies. Then perform a gap assessment against current controls and prioritize remediation by risk and deadline.
What evidence is useful for NIST SP 800-171 Rev. 3?
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Useful evidence includes SSP, CUI data-flow diagrams, asset inventories, control implementation statements, POA&Ms, access reviews, audit logs, configuration records, vulnerability scans, incident records, training evidence, supplier files, and assessment results. Evidence should be version-controlled, attributable to owners, linked to obligations and controls, and retained for the required review or audit period.
How often should the program be reviewed?
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Review it at planned intervals and whenever laws, products, vendors, incidents, reporting cycles, customer commitments, technical standards, or assurance expectations change. Higher-risk obligations should have more frequent monitoring and management reporting.
Official Documentation
Official PDF for NIST SP 800-171
Official publication or summary for NIST SP 800-171
Official online resource
National Institute of Standards and Technology (NIST) guidance and reference material
Implementation toolkit
Templates, guidance, or companion resources for NIST SP 800-171