What should teams do first when CMMC requirements are unclear?

Start with scope before controls or evidence

When CMMC requirements are unclear, the first move is to define the boundary, not to start collecting artifacts. A structured scope review should identify which contracts apply, what information is in play, where that information lives, and which systems, users, and third parties can reach it. That sequence prevents teams from building controls around the wrong environment.

Scope also determines whether the effort is about Federal Contract Information, Controlled Unclassified Information, or both, and that distinction changes what evidence is worth gathering. If the team cannot describe the information flow and system boundary in plain terms, it is too early to write a System Security Plan, choose safeguards, or negotiate a remediation plan.

For contractors, the practical question is not only “what does CMMC ask for?” but “what portion of the business is actually in scope for this contract and this data set?” The right scope review turns a vague compliance request into an auditable target set, which is the only way to avoid over-controlling low-risk systems while leaving relevant ones untreated.

What a useful scope review must answer

A good first-pass review answers four questions: which contract clauses or flow-downs apply, which information types are handled, which systems store, process, or transmit that information, and who owns each control or exception. Those answers should be based on actual data handling and access paths, not on what a tool inventory happens to show.

• Map each in-scope information type to the systems that create, store, process, or transmit it.
• Separate business systems from enclave systems so the boundary is explicit.
• Identify shared services, managed service providers, and remote administration paths that can expand scope.
• Assign a named owner for each control domain, evidence source, and remediation decision.

The most common failure is treating scoping as a documentation exercise after control work has already begun. At that point, teams often discover that evidence, asset lists, and account inventories were gathered for a boundary that was never formally justified. Rework is expensive because it affects both the scope statement and the control set built on top of it.

How to avoid false confidence in the boundary

Teams should assume the boundary is wrong until it has been challenged from both the contract side and the technical side. Contract language can pull in systems that business teams do not consider part of the program, while technical dependencies can expose data paths that the proposal or kickoff discussion never mentioned. That is why the first review has to reconcile legal, program, engineering, and security views.

Where application behaviour and access control matter, use a control baseline that makes scope decisions testable rather than inferred. For example, OWASP ASVS helps teams think about where authentication, session handling, and authorization boundaries actually sit in the system, which is useful when the CMMC boundary depends on how data is reached rather than on a simple network diagram.

That same discipline should be applied to any repository, portal, integration, or shared service that can reach covered information. If a component can read, move, or expose the relevant data, it is part of the scoping discussion even if it is owned by another team or hosted outside the immediate project.

Risk and Threat Considerations

Unclear CMMC scope creates a control mismatch risk: teams may implement safeguards for systems that do not belong in the assessment while leaving real exposure unaddressed. It also creates an attack-path problem, because unexamined data flows, remote access routes, and shared services often become the weak links in the boundary.

Failure mechanism: When the boundary is inferred instead of reviewed, teams can misclassify systems, undercount data paths, and assign controls to the wrong owners. That weakens evidence quality and can leave a reachable system outside the intended protection model.

Impact: The organisation can end up with a non-defensible scope statement, failed assessment readiness, or a gap between the documented boundary and the actual environment. In the worst case, the team discovers the problem only after remediation work, which delays certification and increases the cost of rework.

Practitioner Guidance

What to prioritise: Establish the contract-to-data-to-system chain first. If you cannot explain which requirement drives the scope, pause all control implementation until that chain is documented and signed off by the accountable owner.

What to verify: Confirm that the scope review covers shared identities, managed services, backups, logging platforms, and admin paths, because these often extend the real boundary beyond the obvious production system.

Decision rule: If a system can touch covered information or supports a control that protects it, treat it as scope-relevant until proven otherwise. If a team cannot prove exclusion, assume inclusion for the review.

Practitioner takeaway: The fastest path is not to start controls, it is to converge on a defensible boundary that aligns contract terms, information flow, and system ownership before any evidence collection begins.

Related resources from NHI Mgmt Group

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• How should security teams govern non-human identities for compliance?
• How should security teams govern non-human identities in Salesforce?