Crypto With Block

alerts

Bithumb confirms data leak affecting customer personal information

Bithumb says a breach first described as internal also exposed customer data, with 844 customers' personal information leaked. If you use Bithumb, watch for phishing pretending to be the exchange and secure your account.

October 30, 2026 · 1 min read

Affected: see below

What happened

Bithumb first described the incident as an internal breach, then confirmed that customer data was leaked too. Reports say 844 customers had personal information exposed. One report says 6,444 customers were affected in total, along with 715 employees. Regulators have reportedly begun a raid as part of their response. The sources do not say exactly which details were exposed or whether any funds were taken.

Who is affected

Mainly Bithumb customers, especially the 844 whose personal information was reportedly exposed. Bithumb is expected to contact those affected directly. Reported figures differ between outlets, so the exact number is not yet clear.

What to do now

  • Open the Bithumb app or site yourself, not through any message, and check for an official notice about the breach.
  • Review your account activity, logins and withdrawal history for anything you don't recognize.
  • Change your Bithumb password to a unique one, and change it anywhere else you reused it.
  • Turn on an authenticator app or passkey for your account instead of relying on SMS codes.
  • Expect phishing emails, texts or calls that pretend to be Bithumb or a regulator, and never share codes or passwords.
  • Ignore any message that asks you to verify a wallet or move funds, and contact Bithumb through its official app if unsure.

Our alerts never ask you to click a link, log in, "verify" a wallet or move funds. Expect scammers to copy this news: if a message about it asks for any of that, it's a scam.

Sources

Written by AI Security Watch from the sources above and published automatically. Education only, not financial advice.