Bithumb hacked via internal employee system; exchange checking if customer data was exposed.

Bithumb, South Korea's second-largest crypto exchange, said an external party breached its internal mobile system used by employees on Wednesday, stealing personal data. No crypto assets were reported lost as of Asian afternoon hours.

The intrusion was discovered on Tuesday and reported to the Korea Internet & Security Agency and the Personal Information Protection Commission. The compromised system is separate from the trading platform, so customer virtual assets remain inaccessible, though the exact number of affected users has not been disclosed.

This breach is the third incident the Financial Supervisory Service is reviewing that day, following attacks on Daishin Securities and Mirae Asset Global Investments. FSS noted that as of Oct. 14, 16 South Korean financial firms had faced cyberattacks, and it is Bithumb's second internal‑control issue this year after a mistaken 620,000 BTC credit in February.

Summary rewritten by AI from the original article by CoinDesk.