Mapped to NIST 800-171 Requirement: 3.8.1
CMMC Assessment Objective: MP.L2-3.8.1[b]
What This Objective Means
It’s not enough to know what media could contain CUI—you must prove that you’ve documented it. This typically includes:
• What types of media are used
• Where and how CUI is stored or transmitted
• Any restrictions on certain media types
• Where these definitions appear in your policies and system documentation
The documentation must be complete, consistent, and accessible to those who handle or manage CUI.
Why It Matters
Without documented media definitions:
• Users may rely on personal judgment when handling sensitive data
• Inconsistent storage practices can lead to CUI spillage or loss
• Policy enforcement and audit readiness are weakened
• You may fail to apply appropriate protections to all media types
Clarity and control come from documentation.
How to Implement It
1. Review and Update Key Documentation Ensure your list of CUI media appears in:
• System Security Plan (SSP)
• Access Control or Media Protection Policy
• Data Handling Procedures
• Acceptable Use Policy
2. Include Specific Media Types Examples:
• Cloud storage (e.g., OneDrive, SharePoint, AWS S3)
• On-prem file servers
• USB drives or portable SSDs
• Mobile devices or tablets
• Printed records
3. Tie Media to Risk and Usage Context
• Identify which media types are high-risk (e.g., portable or removable)
• Document how those are handled differently (e.g., encryption required)
4. Track Media Ownership and Access
• Ensure media is listed in an asset inventory or tracking system
• Identify owners, users, and systems associated with each type
Evidence the Assessor Will Look For
• Media Protection Policy or SSP listing CUI media types
• Asset or device inventories with CUI designation
• Classification of digital and physical media types by sensitivity
• Examples of acceptable and prohibited media use
Common Gaps
• No documented list of CUI media types
• Policies reference “media” in general but don’t specify formats
• Staff unsure whether certain devices or platforms (e.g., cloud sync) are authorized for CUI
• No clear distinction between secure and insecure storage methods
How Cuick Trac Helps
Cuick Trac supports this requirement by:
• Providing prebuilt templates for documenting CUI media types
• Helping map where and how CUI flows across media and systems
• Supporting media classification and tagging across endpoints
• Restricting unauthorized media usage via policy enforcement
• Maintaining a current, auditable list of all media types used for CUI
With Cuick Trac, your documentation matches your reality—and meets compliance every time.
Final CTA
What’s in your policy is what protects your data.
Schedule a Cuick Trac demo to document your CUI media types and lock in compliance with confidence.