As cybersecurity threats continue to evolve, the U.S. Department of Defense (DoD) has implemented the Cybersecurity Maturity Model Certification (CMMC) framework to protect sensitive government data throughout the entire Defense Industrial Base (DIB) — an ecosystem of over 300,000 companies, which includes not only the large prime contractors, but also subcontractors, managed service providers (MSPs/MSSPs), cloud vendors, software developers, staffing firms, and other suppliers. Many of these organizations may not have historically had to implement such stringent cybersecurity measures, so understanding the CMMC is crucial for future contract eligibility.
In this post, we’ll break down what CMMC is, debunk common myths, and help you understand what it takes to prepare.
What Is CMMC?
The Cybersecurity Maturity Model Certification (CMMC) is a compliance standard built primarily on NIST SP 800-171 to assess and enhance the cybersecurity posture of organizations within the DoD supply chain, with the primary focus of protecting Controlled Unclassified Information (CUI) in non-federal systems.
The CMMC has three compliance tiers:
- Level 1 (Foundational): Focuses on 17 basic safeguarding practices for Federal Contract Information (FCI) and requires an annual self-assessment and affirmation by company leadership.
- Level 2 (Advanced): Encompasses the 110 controls from NIST 800-171 for protecting CUI. Some organizations may be eligible to conduct self-assessments; others will require third-party assessments conducted by a C3PAO.
- Level 3 (Expert): Adds enhanced requirements based on NIST 800-172, for contractors with highly sensitive DoD work (primarily reserved for select primes) and required government led assessments.
The required level an organization must meet is dictated based on the type and sensitivity of the information being handled, and their role in the supply chain.
Common Misconceptions About CMMC
Even though the CMMC is largely based on NIST 800-171, which has been around for quite some time, there are still several widespread misconceptions about CMMC compliance that can lead to confusion or mislead organizations:
- “The CMMC only applies to large defense contractors.”
Not true. The CMMC applies to all organizations in the defense supply chain, including small businesses, subcontractors, cloud vendors, and managed services providers, especially those responsible handling, processing, or protecting CUI.
- “The CMMC is just a checklist or paperwork exercise.”
The CMMC is about demonstrating mature, repeatable, and enforceable security practices, and requires technical implementation, governance, and evidence of real-world implementation and ongoing effectiveness. Documentation is critical but so is demonstrating your controls in practice.
- “I’m NIST 800-171 compliant, so I should be CMMC compliant.”
Although the CMMC is largely based on NIST 800-171, many organizations assume compliance with NIST 800-171, and submit self-assessments, without reviewing the individual assessment objectives. With the CMMC, an organization must prepare to be audited by a third party and should gather appropriate evidence against each of the 300+ assessment objectives.
- “We can pass with partial implementation or just a plan.”
Wrong. While Plans of Action and Milestones (POA&Ms) allow organizations to defer some controls, they are temporary, so they must be closed within a defined period. Additionally, many key controls cannot be deferred, and organizations must meet a minimum score and close all critical gaps before certification.
- “Using Microsoft GCC or AWS GovCloud makes us compliant.”
Using FedRAMP compliant services helps to support compliance, but there are several controls around those services which still need to be implemented, managed, and documented. CMMC compliance is about your organization’s entire environment, not just your tools.
How Organizations Can Prepare for CMMC
Preparing for CMMC isn’t a one-and-done checklist, it is a strategic initiative that requires resources, a clear understanding of what’s in scope, careful planning and execution, and long-term maintenance. Here’s some tips to get started:
- Understand Your CMMC Scope
Identify where FCI and/or CUI resides, and map out all users, systems, processes, and vendors that interact with or process this data. This helps to define your assessment boundary.
- Conduct a Gap Assessment
Conduct a self-assessment to compare your current cybersecurity posture against the required controls for your target level. Most organizations seeking certification will require Level 2 compliance and should use NIST 800-171A to perform a control-by-control assessment (don’t forget to examine each of the control assessment objectives).
- Build Your System Security Plan (SSP)
Your SSP is a living document that outlines your system architecture and should include details on how each control is implemented across your environment, network diagrams, asset inventory, and policies. The SSP will be required for both self-assessments as well as for the third-party assessment, and it is one of the first things assessors will ask for.
- Submit Your SPRS Score
If you’re pursuing Level 2, you must perform a NIST 800-171 self-assessment and submit your Supplier Performance Risk System (SPRS) score. A perfect score is 110, and any score less than that should be supported with a POA&M (where allowed).
- Remediate and Harden Your Environment
Fix identified gaps through the implementation of technical controls and/or the development of additional documentation / policy. Validate that all security protections are operational and monitored, and track remediation in a formal POA&M, and be sure to close out non-negotiable controls before your assessment.
- Engage Expert Help
Consider working with an experienced third party to help guide your compliance efforts, and if a third-party assessment is required, coordinate with a Certified Third-Party Assessment Organization (C3PAO).
- Plan for Continued Compliance
Once you have prepared your environment, documentation, and personnel for review, and selected a Certified Third-Party Assessment Organization (C3PAO) you should be nearly ready for your assessment; however, you should realize that the CMMC is not a one-time audit. It’s about building sustainable security practices and implementing a continuous monitoring strategy to maintain readiness and maturity over time.
Final Thoughts
While the CMMC requirements may seem daunting, they are ultimately a positive shift toward stronger, more resilient systems. Organizations that act early and invest in robust security will not only meet the CMMC requirements, they’ll be more competitive and more secure in the long run. Contact us for your CMMC requirements inquiry@securit360.com