Mapping C2M2 domains and practices to CMMC 2.0 and NIST SP 800-171 controls
C2M2, CMMC, and NIST SP 800-171 share significant conceptual overlap but serve different purposes and sectors. Understanding the relationships helps organizations avoid redundant work and identify where investments in one framework support another.
💡 Organizations pursuing both C2M2 and CMMC should note: work done for CMMC (policies, IAM controls, incident response) typically counts toward C2M2 MIL 2 management practices. C2M2 OT practices have no CMMC equivalent — they must be addressed separately.
The table below maps C2M2 domains to their closest CMMC 2.0 domain equivalents and key NIST SP 800-171 control families. Mapping type: Exact = direct coverage, Partial = overlapping but not fully equivalent, Gap = no equivalent.
| C2M2 Domain | C2M2 Practices (Examples) | CMMC 2.0 Domain(s) | NIST SP 800-171 Family | Mapping Type | Notes |
|---|---|---|---|---|---|
| ASSET | Asset inventory, change management, baseline configurations | CM Configuration Management | 3.4 CM Family | Partial | CMMC CM covers configuration; C2M2 ASSET includes broader asset inventory and OT-specific practices not in 800-171 |
| THREAT | Vulnerability scanning, threat intelligence, remediation tracking | SI System & Info Integrity; RA Risk Assessment | 3.11 RA; 3.14 SI | Partial | NIST 800-171 RA and SI cover vulnerability scanning and flaw remediation; C2M2 adds threat intelligence sharing practices |
| RISK | Risk identification, risk strategy, risk tolerance | RA Risk Assessment; CA Assessment & Authorization | 3.11 RA | Partial | C2M2 RISK has stronger emphasis on enterprise risk management integration (MIL 3) than 800-171 RA family |
| ACCESS | User management, MFA, least privilege, access reviews | AC Access Control; IA Identification & Authentication | 3.1 AC; 3.5 IA | Exact | Strong overlap — CMMC AC and IA controls map closely to C2M2 ACCESS domain practices at MIL 1 and MIL 2 |
| SITUATION | Logging, log protection, event monitoring, info sharing | AU Audit & Accountability | 3.3 AU | Partial | CMMC AU covers audit logging; C2M2 SITUATION adds situational awareness information sharing (MIL 3) not in 800-171 |
| RESPONSE | Detection, escalation, IRP, COOP, backup/recovery | IR Incident Response; RE Recovery | 3.6 IR | Partial | C2M2 RESPONSE includes continuity of operations (COOP) practices not covered by CMMC IR; recovery plans and COOP exercises are C2M2-specific |
| THIRD-PARTIES | Vendor inventory, third-party requirements, contract clauses | SR Supply Chain Risk Management | 3.17 SR (800-171r2) | Partial | CMMC SR was added in CMMC 2.0; C2M2 THIRD-PARTIES covers vendor relationship management more broadly |
| WORKFORCE | Cybersecurity training, role assignments, personnel screening | AT Awareness & Training; PS Personnel Security | 3.2 AT; 3.9 PS | Exact | Good coverage — CMMC AT and PS practices closely mirror C2M2 WORKFORCE domain across MIL 1 and MIL 2 |
| ARCHITECTURE | Network segmentation, hardening, secure dev practices | SC System & Communications; SA System & Services Acquisition | 3.13 SC; 3.15 SA (limited) | Partial | C2M2 ARCHITECTURE includes OT architecture practices and broader secure design strategy not fully addressed by CMMC/800-171 |
| PROGRAM | Program strategy, governance, executive reporting | CA Security Assessment; (limited) | 3.12 CA | Partial | C2M2 PROGRAM is broader than CMMC's CA domain — it covers enterprise governance, executive reporting, and program integration that 800-171 does not fully address |
The following C2M2 practice areas are not covered by CMMC 2.0 / NIST SP 800-171 and must be addressed separately if pursuing C2M2:
| C2M2 Practice Area | Domain | Why It's a Gap |
|---|---|---|
| OT / ICS asset inventory and configuration management | ASSET | CMMC focuses on IT systems protecting CUI; OT/ICS systems are out of scope for CMMC |
| Continuity of Operations (COOP) planning and exercises | RESPONSE | CMMC IR does not require COOP plans or exercises; this is a C2M2-specific requirement |
| Threat intelligence sharing with sector peers (ISAC) | THREAT / SITUATION | CMMC doesn't require bidirectional threat intel sharing; C2M2 MIL 3 practices emphasize this |
| Cybersecurity architecture strategy and review | ARCHITECTURE | C2M2 requires a documented architecture strategy and periodic reviews; CMMC addresses controls, not architecture governance |
| Enterprise risk management integration | RISK / PROGRAM | C2M2 MIL 3 requires integrating cybersecurity risk into ERM; CMMC's RA family is narrower |