Understanding CUI

Understanding CUI

Most defense contractors don’t fail CMMC assessments because they can’t implement a control. They fail because they didn’t know what they were protecting in the first place. This guide shows you exactly what Controlled Unclassified Information is, how to recognize it, and where to find it in your environment before an assessor shows up.

CUI is the entire basis for CMMC Level 2. If you have it and don’t know it, you’ve got a compliance gap before you’ve even started. If you think you have it but don’t, you’re spending money securing systems that never needed to be in scope.

This guide helps you answer the question defense contractors ask us more than almost any other: do I even have CUI?

Who it’s for:

Defense contractors preparing for a CMMC Level 2 assessment
IT and security leaders trying to scope their environment correctly
Compliance teams building or refining their System Security Plan
Anyone who inherited a CMMC program and isn’t sure which data actually qualifies

Download the full guide below. It’s free, and no one from our team will hound you afterward.

Not Sure What Counts as CUI in Your Environment?

Watch our free playlists on YouTube where we walk through CMMC scoping, CUI boundaries, and real-world readiness questions from defense contractors like you.

What’s Inside the Guide

The guide walks through the practical side of CUI identification, not just the regulatory definition.

Where CUI fits in the data hierarchy and how it differs from FCI and other sensitive data
How to recognize CUI in the real world when it isn’t properly marked
The most common places CUI shows up in a defense contractor’s environment
Signals that a piece of data is likely CUI even if no one labeled it
What to do when you find CUI in places it shouldn’t be

Why This Matters Before Your Assessment

CUI identification is the first thing an assessor checks and the last thing most contractors get right. Getting it wrong means either failing the assessment or over-scoping your environment and paying to secure systems that never needed controls.

This guide is the same starting point we walk our own clients through before we touch their System Security Plan or architecture. If you’re early in your CMMC journey, reading it first will save you weeks of rework later.