CMMC vs NIST SP 800-171

Key Differences

NIST SP 800-171 contains 110 security requirements derived from NIST SP 800-53, targeted at non-federal contractors handling Controlled Unclassified Information. Self-attestation was historically sufficient under DFARS 7012; CMMC 2.0 Level 2 now requires third-party assessment by a C3PAO for organisations pursuing DoD contracts with CUI.

The critical distinction for defense-sector buyers: achieving NIST SP 800-53 Moderate baseline compliance satisfies all NIST SP 800-171 requirements and provides the technical foundation for CMMC Level 2 — making 800-53 the higher-order investment from which the others derive.

CyberSilo maintains crosswalk mappings automatically, so evidence collected for an NIST SP 800-53 control simultaneously satisfies the FedRAMP equivalent and the applicable CMMC practice. Explore NIST SP 800-53 Compliance and FISMA Compliance for the full federal control stack.