Bithumb Hack Also Exposed Customer Personal Data, Widening Breach Scope

Customer personal data was also leaked in a recent hack of Bithumb's internal systems, industry sources said on October 29.

A hacking incident involving Bithumb's internal mobile work system on October 27 resulted in the leak of several hundred cases of customer information, according to the industry sources. The incident is believed to have occurred when an unauthorized party made abnormal access attempts on the internal mobile system.

Bithumb confirmed the damage immediately after the hack and reported to financial authorities and the Personal Information Protection Commission that employee information had been exposed. The company is later understood to have discovered that customer data had also been leaked while analyzing the full extent of the attack. The specific types of information exposed and the size of the breach have not been disclosed.

Bithumb said its internal work system is separated from the network used for its virtual-asset trading platform. As a result, the breach could not have been used to access customers' crypto assets.