A new survey by Snow Software highlights how employees are putting companies at risk by failing to follow IT regulations. The report singles out millennials as the worst offenders, as 81% of them admitted to ignoring IT guidelines by making use of unapproved apps on work devices, thereby putting their company at risk of malware and other cyber threats. The number of older employees engaging in such risky behavior was twice as low.

The study also found that managers and executives were twice as likely to ignore IT rules than was true for lower-level staff. The majority of executives (57%) said they had engaged in risky IT behavior. These actions had negative consequences for the firm in a staggering 93% of cases.

Read more: Millennials are twice as likely to ignore office IT rules