Bithumb Investigates Exposure of Personal Information

Bithumb said an attacker accessed an internal employee communication system and exposed personal information, prompting an investigation into whether customer data was included. The South Korean cryptocurrency exchange said it discovered the unauthorized access on October 27 and reported it to authorities that day. It has not disclosed how many people were affected or what specific information was taken. Bithumb said the compromised mobile groupware system is separate from its trading infrastructure and that customer virtual assets could not be accessed through it. The company has not reported cryptocurrency losses. Its review is examining whether member information was present in the exposed material, and no completion date for that investigation has been announced. The affected tool was identified in some reports as Daou Office, which employees use for messaging and file sharing. Bithumb has not publicly explained how the attacker gained access. Its statements about system separation and asset safety are company claims; technical findings establishing the breach’s full scope have not been reported. The incident was disclosed alongside separate security incidents at Daishin...