2.76 mln pieces of customers' info at Hollys leaked in cyberattack

What happened: Hollys, a South Korean coffee chain, reported that customer data from its membership program was leaked in a cyberattack. The company said it detected unauthorized system access and is still investigating the scope. Key numbers: 2.76 million pieces of personal information stolen between Sept. 3 and Oct. Why it matters: The breach follows back-to-back customer data leaks at local financial firms early this month, according to financial regulators. Hollys said the leaked data appears to be temporary files from a past membership service overhaul, not its active customer database.

Hollys, a South Korean coffee chain, reported that customer data from its membership program was leaked in a cyberattack. The company said it detected unauthorized system access and is still investigating the scope.

The breach follows back-to-back customer data leaks at local financial firms early this month, according to financial regulators. Hollys said the leaked data appears to be temporary files from a past membership service overhaul, not its active customer database.