CoinMarketCap data breach
The CoinMarketCap breach happened on October 12, 2021 and exposed 3,117,548 accounts. Only one kind of data was exposed: Email addresses.
Overview
- Site
- coinmarketcap.com
- Breach date
- October 12, 2021
- Recorded on
- October 22, 2021
- Accounts exposed
- 3,117,548
- Exposed data
- Email addresses
- Risk score
- 10 out of 100
Risk based on the exposed data
This breach scores 10 out of 100. The score is driven mostly by Email addresses.
The risk score is a guide to how dangerous a breach is, judged by the kinds of data exposed. The number of accounts is not included.
Breaches from the same period
- Animeify (2021-10-14, 808,034 accounts)
- ActMobile (2021-10-08, 1,583,193 accounts)
- Protemps (2021-10-04, 49,591 accounts)
What affected users should do
- Passwords were not exposed, but you may receive fake emails aimed at the exposed email addresses.
- Turn on two-factor authentication for your login.
This site organizes publicly available information about data breaches. Data as of September 21, 2025. Breach dates are as originally listed; when only the month is known, the date is recorded as the 1st.