The Coldcard Firmware Exploit: What Happened, Who's Affected, and What It Means for Every Hardware Wallet User
What Happened On-chain analysts estimate 1,000-1,300 Bitcoin addresses were compromised via a March 2021 firmware bug that weakened seed entropy on Coldcard devices, with $70-90 million at risk of forced sales. The vulnerability, now being actively exploited this weekend, traces to a flaw in how