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Three South Korean financial firms including Bithumb report data breaches, Yonhap says

By Thomson Reuters Oct 27, 2026 | 8:03 PM

SEOUL, Oct 28 (Reuters) – Three South Korean financial firms reported data breaches on Wednesday, the Yonhap News ​Agency said.

Here are some details:

• ‌Crypto exchange Bithumb said its in-house mobile system had been hacked and personal information leaked, Yonhap reported. It was investigating ‌whether ​member data was included.

• ⁠Brokerage Daishin Securities ⁠said about 38,000 pieces of customer information had been leaked and that it had taken emergency measures, according ​to Yonhap.

• Asset manager Mirae Asset Global Investments had also confirmed ⁠a hacking incident, ⁠and authorities were assessing the ​situation, the report said.

• Spokespeople for Bithumb, ​Daishin and Mirae Asset could not ‌be immediately reached for comment.

• The incidents follow a wave of hacking attacks at 16 South Korean financial ⁠firms, including banks, causing around 100,000 cases of data leaks so far, according to ⁠the Financial ‌Services Commission (FSC) earlier this ⁠month.

• Separately, Seoul’s Science Ministry ​and ‌the Korea Internet & Security ​Agency have ⁠urged website operators to check for PHP flaws. The flaws let attackers run malicious commands on a server without logging in.

(Reporting by Joyce LeeEditing by ​Ed Davies)