Bits of Gold, a Tel Aviv-based cryptocurrency broker holding financial services license 56716 from Israel’s Capital Market, Insurance and Savings Authority, notified customers on Aug. 16 that unauthorized access had been found in a third-party system the company uses for customer support and data analysis. The company said it detected the intrusion several days before the notice, cut off the compromised system from its data sources, and alerted regulators.

The breach traces back to a software vendor used by Bits of Gold, not a direct strike on the broker’s own network. Bits of Gold said it was one of potentially hundreds of businesses worldwide caught up in the same attack on the software provider, and that available information…