NIST 800-171
NIST 800-171 defines security requirements that underpin many defense compliance programs handling controlled unclassified information.
Working Definition
Security requirement framework for protecting CUI in nonfederal systems.
Why This Term Matters
NIST 800-171 appears frequently in buyer requests, contract language, and assessment prep work. Teams should align on a consistent internal definition so scope decisions, artifact quality, and remediation priorities remain stable across technical and non-technical stakeholders.
Operational Use in CMMC Programs
When teams reference NIST 800-171, they should also document:
- Which systems and workflows are affected
- Which control outcomes are impacted
- Which evidence artifacts demonstrate implementation
- Which owner approves updates or exceptions
Common Misunderstandings
Many organizations treat terminology as theoretical rather than operational. In practice, terms like NIST 800-171 affect architecture, workflows, training, and reporting cadence. Clarifying definitions early reduces rework later in the readiness cycle.