Organizations often suffer harm from individuals who bear them no malice but whose actions unintentionally expose the organizations to risk in some way. This paper examines initial findings from research on such cases, referred to as unintentional insider threat (UIT). The goal of this paper is to inform government and industry stakeholders about the problem and its possible causes and mitigation strategies. As an initial approach to addressing the problem, we developed an operational

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... for UIT, reviewed research relevant to possible causes and contributing factors, and provided examples of UIT cases and their frequencies across several categories. We conclude the paper by discussing initial recommendations on mitigation strategies and countermeasures.