# CMMC vs. ISO 27001: Similarities, Differences, Mapping, and Bundling Learn how data security standards CMMC 2.0 and ISO 27001 compare in purpose, scope, controls, and processes. Explore our CMMC-ISO 27001 control map, time and cost to implement, and overlap strategies. ## How do ISO 27001 and CMMC compare? ISO 27001 and CMMC 2.0 both strengthen cybersecurity, but they apply differently. ISO 27001 is a global information security standard used throughout industries, while CMMC is a U.S. Department of Defense certification with prescriptive requirements to safeguard Federal Contract Information (FCI) and Controlled Unclassified Information (CUI). - **ISO 27001**: Supports the establishment of an Information Security Management System (ISMS) to protect all types of information assets, including digital records, physical files, and intellectual property. - **CMMC 2.0**: Operates with a narrower scope of specific requirements that protect FCI and CUI, exclusively targeting DoD prime contractors and subcontractors. ### ISO 27001 vs. CMMC | Aspect | ISO 27001 | CMMC 2.0 | |-----------------------------|-------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------| | **Purpose** | Global standard that establishes a risk-based Information Security Management System (ISMS) framework. | DoD maturity model for protecting defense supply chain data | | **Who it Applies To** | Any organization or industry | DoD contractors and subcontractors | | **Required By** | Voluntary, and often market/customer-driven | Mandatory for DoD contracts handling FCI/CUI | | **Based on NIST?** | Not NIST-based — uses the ISO/IEC 27001:2022 framework with 93 Annex A controls | Aligned to NIST SP 800-171 Rev. 2 (Level 2) and 24 selected requirements from NIST SP 800-172 (Level 3); Level 1 is based on FAR 52.204-21 | | **Scope** | Broad: all digital, physical, and IP information assets | Narrow: only FCI and CUI | | **Third-Party Audit** | Carried out by accredited certifying bodies — valid for 3 years, subject to annual reviews | Carried out by DoD-accredited assessors for a 3-year certification | ### How do CMMC levels relate to ISO 27001? CMMC levels do not correspond directly to ISO 27001, but there is overlap. ISO 27001 is a single, flexible certification based on risk management, while CMMC progresses through three maturity levels tied to DoD contract requirements. ### Differences between CMMC and ISO 27001 - CMMC applies to DoD contractors and subcontractors, while ISO 27001 may apply to any organization worldwide. - CMMC protects FCI and CUI, while ISO 27001 safeguards all information assets. - CMMC uses prescriptive measures, while ISO 27001 follows a risk-driven, adaptable approach. - CMMC assessments are conducted by DoD-accredited assessors on a three-year cycle with annual affirmation. ISO 27001 audits are conducted by independent certification bodies. - CMMC is mandatory when a DoD contract specifies a level; ISO 27001 is not government-mandated but is frequently required by customers. ### CMMC Level 1 vs. ISO 27001 | Aspect | CMMC Level 1 | ISO 27001 | |--------------|-----------------------------------------------------------------------|---------------------------------------------------------------| | **Scope** | FCI | All organizational data | | **Depth** | 15 FAR requirements | Entire ISMS with 93 controls in Annex A | | **Approach** | Checklist-based | Risk-based and adaptable | | **Certification** | Self-assessment | Third-party audit and surveillance | | **Recognition** | DoD-specific | Global | ### CMMC Level 2 vs. ISO 27001 | Aspect | CMMC Level 2 | ISO 27001 | |--------------|-----------------------------------------------------------------------|---------------------------------------------------------------| | **Scope** | FCI and CUI | All assets | | **Depth** | 110 practices tied to NIST SP 800-171 | 93 adaptable Annex A controls | | **Approach** | Prescriptive | Flexible and risk-driven | | **Certification** | Accredited audit every 3 years, with annual affirmation | Accredited third-party audits | | **Recognition** | DoD-specific | Global | ### CMMC Level 3 vs. ISO 27001 | Aspect | CMMC Level 3 | ISO 27001 | |--------------|-----------------------------------------------------------------------|---------------------------------------------------------------| | **Scope** | Protects highly sensitive defense information | All assets | | **Depth** | Includes Level 2 plus additional requirements from NIST SP 800-172 | Relies on 93 Annex A controls | | **Approach** | Prescriptive and advanced | Risk-based | | **Certification** | DoD-accredited assessment | Independent audits with annual surveillance | | **Recognition** | DoD-specific | Global | ## Streamline CMMC and ISO 27001 compliance with Strike Graph Running two compliance programs in parallel doesn’t have to double your work. Strike Graph gives you a single platform for CMMC and ISO 27001 to map controls, track evidence, and manage audits across both frameworks, helping you cut duplication and stay compliant with less effort. [Schedule a Strike Graph demo today.](https://www.strikegraph.com/demo) ## FAQs on CMMC 2.0 vs. ISO 27001 ### How are CMMC 2.0 and ISO 27001 related to NIST? CMMC 2.0 mainly draws its controls from NIST SP 800-171, but ISO 27001 follows a risk-based approach matching ISMS standards. ### Which should I do first — ISO 27001 or CMMC? Businesses that require defense contracts in the near future should start by prioritizing CMMC.