Understanding CMMC 2.0 vs. NIST 800-171: What Your Team Needs to Know
As defense contractors, understanding the cybersecurity frameworks that govern your operations is crucial. This brief overview highlights the key differences between CMMC 2.0 and NIST 800-171.
NIST 800-171 was established to protect Controlled Unclassified Information (CUI) in non-federal systems. It features 110 security requirements across 14 families and has been the standard for DoD contractors for several years, relying primarily on self-assessment with scores submitted through SPRS.
CMMC 2.0, however, represents the DoD’s evolution of cybersecurity requirements. It builds upon NIST 800-171 but introduces important changes. The framework has been streamlined to three levels: Level 1 requires 17 basic practices, Level 2 incorporates all 110 NIST 800-171 requirements, and Level 3 includes Level 2 requirements plus additional NIST 800-172 controls.
The most significant change is in assessment methodology. While NIST 800-171 relies on self-attestation, CMMC 2.0 introduces third-party assessments for some Level 2 contractors and all Level 3 contractors, bringing greater accountability to the process.
CMMC 2.0 also offers more flexibility through Plans of Action & Milestones (POA&Ms) and limited waivers under certain circumstances, which wasn’t formally available under NIST 800-171.
As we prepare for CMMC 2.0 implementation, your team should focus on maintaining NIST 800-171 compliance while monitoring DoD announcements regarding CMMC 2.0 rulemaking. Remember, CMMC 2.0 doesn’t replace NIST 800-171—it builds upon it with additional requirements and verification processes.
