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Bithumb
Seoul, South Korea1 source
Reported:Reported by the press on 5 Nov 2026. The organisation has not confirmed it yet.
Cryptocurrency exchange Bithumb reports employee system breach
An employee support system at the cryptocurrency exchange was breached, reported on November 5, 2026, amidst a wider wave of financial sector leaks in South Korea. Details on the scope of the breach were limited.
- Type
- Data breach
- Sector
- Finance
- First reported
- 5 Nov 2026
- Latest source
- 5 Nov 2026
What to do
- If you have an account, change that password, and anywhere you reused it.
- Turn on two-factor authentication, ideally an authenticator app or passkey, not SMS.
- Expect phishing that uses your real details. Do not click links in messages about this incident; go to the company's site directly.
- If payment cards were involved, watch statements and ask your bank for a new card.
- If government ID or social security numbers were involved, consider a credit freeze.
- If this is a vendor of yours, ask what of your data they held and whether it was in scope.
- Reset any API keys, SSO trusts or shared credentials you have with them.
- Brief your help desk: attackers often impersonate the breached brand next.
Not sure? Ask an assistant with the sources attached, or have a coding agent check your systems.
Check your systems for Bithumb
Sources
1Confidence 60% that this is real and correctly placed. Locations are city centroids at best. Spotted an error? Report a correction.