South Korean cryptocurrency exchange Bithumb discovered on Oct. 27, 2026, that attackers had infiltrated an internal mobile system used for work and employee messaging. Preliminary information indicates employees’ personal information was leaked, but Bithumb is still assessing the breach and whether customer data was accessible. The company has not disclosed how the attackers gained access, how many people were affected or what information was compromised.
Bithumb said the system is separate from its trading infrastructure and cannot be used to access customers’ virtual assets. No cryptocurrency theft had been reported as of publication, and it was unclear whether deposits or withdrawals were affected. Bithumb notified South Korean cyber and privacy authorities, which are investigating the breach.
