Which level of sensitivity does DoD mission-critical information that is not specifically authorized to be classified fall under?

DoD mission-critical information that is not specifically authorized to be classified typically falls under the designation of "Controlled Unclassified Information" (CUI). This category includes information that requires safeguarding or dissemination controls but does not meet the criteria for classification under Executive Order 13526 or related directives. It is essential to protect CUI to ensure national security and operational effectiveness.