Cybersecurity Maturity Model Certification
Also known as: CMMC, CMMC 2.0
The Cybersecurity Maturity Model Certification (CMMC) is the Department of Defense program that verifies whether contractors meet the cybersecurity controls already required by FAR 52.204-21 and NIST SP 800-171. It defines three certification levels and the assessment mechanism for each, established by 32 CFR Part 170 and made contractually binding by DFARS 252.204-7021.
Related terms
- CMMC Level 1
CMMC Level 1 is the lowest of the three CMMC certification tiers, covering contractors who handle Federal Contract Information (FCI) but not CUI. It requires implementing the 15 safeguarding requirements in FAR 52.204-21(b)(1), an annual self-assessment, and an annual senior-official affirmation posted in SPRS.
- CMMC Level 2
CMMC Level 2 is the middle CMMC certification tier, covering contractors who handle Controlled Unclassified Information (CUI). It requires implementing all 110 controls of NIST SP 800-171 and undergoing either a self-assessment or a triennial assessment by a CMMC Third-Party Assessment Organization (C3PAO) depending on the program's prioritization.
- CMMC Level 3
CMMC Level 3 is the highest CMMC certification tier, reserved for DoD programs involving CUI of the highest priority. It requires implementing NIST SP 800-171 plus 24 enhanced controls drawn from NIST SP 800-172, and triennial assessments performed by the DoD's Defense Industrial Base Cybersecurity Assessment Center (DIBCAC).
- 32 CFR Part 170
32 CFR Part 170 is the Department of Defense final rule that established the CMMC program — defining the three certification levels, the assessment regime, the senior-official affirmation requirement, and the role of C3PAOs and the CMMC Accreditation Body. It became effective December 16, 2024.
- DFARS 252.204-7021
DFARS 252.204-7021 is the contract clause that makes a CMMC certification or self-assessment a material condition of award and continued performance on covered DoD contracts. It took effect November 10, 2025 as part of the 48 CFR final rule, and triggers the annual senior-official affirmation requirement under 32 CFR 170.22.
Read more in the Library
- CMMC Level 1: The Complete 2026 Guide for Small DoD Contractors
The single page to read first. What CMMC Level 1 is, who it applies to, what's actually required, what it costs, and the fastest honest path through it in 2026.
- CMMC Level 1 vs Level 2: Which One Do You Actually Need? (2026 Plain-English Guide)
Most small defense contractors are Level 1, not Level 2 — but the wrong answer here costs you a year and tens of thousands of dollars. Here's the single question that decides it.
- Do I Even Need CMMC? A 4-Question Decision Tree for 2026
Half the small businesses asking about CMMC don't actually need it — and the other half need it more urgently than they realize. Four questions and you'll know where you stand.