Any situation where controlled unclassified information (CUI) is used in a manner inconsistent with the policy contained in Executive Order 13556, 32 Code of Federal Regulations (CFR), the CUI Registry, additional issuances from the CUI Executive Agent, or any of the laws, regulations, and Government-wide policies that establish the designation of CUI categories and subcategories. This may include intentional violations or unintentional errors in safeguarding or disseminating CUI.
Sources:
CNSSI 4009-2015