4. Insider Misuse

Insider misuse accounted for 10.6 percent of confirmed breaches and 20.6 percent of total incidents, the third-highest percentage. Across all industries, the majority of insider misuse was privilege abuse, with 55 percent of incidents, driven by financial incentives and convenience. The main culprits of inside misuse, in order of percentage, included end users, cashiers, finance and executives. The challenge with insider threats is that they can be hard to catch, the report said, with most discovered after the offender had left the company.