A significant attack on Coldcard wallets has resulted in substantial losses of Bitcoin. The incident is reported to have affected over 1,200 addresses, with estimated losses ranging up to $89 million. Security researchers have identified a potential software flaw as the possible cause of the attack.

It is believed that this flaw allowed attackers to steal a substantial amount of bitcoin in a short period of time, specifically roughly $70 million in under an hour. Further details about the attack and its implications are available from security researchers and other sources, including FOX 5 Atlanta.