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.
