hardware wallets

$15B in Bitcoin moved after $130M Coldcard hack

A firmware vulnerability in Coldcard hardware wallets that has drained an estimated $130 million in Bitcoin since July 30 triggered a far larger response across the self-custody ecosystem, with approximately 233,000 BTC — worth roughly $15 billion — migrating from…

Coldcard hack losses still climbing as analysts diverge on total Bitcoin stolen

Nearly two weeks after attackers began draining Bitcoin from compromised Coldcard hardware wallets, blockchain investigators are still working to establish the full scale of what analysts are calling the worst self-custody failure in Bitcoin's history. Estimates of total losses range…

CZ urges wallet diversification after $70M Coldcard exploit

Binance founder Changpeng Zhao urged crypto holders to spread their funds across multiple wallets after a firmware flaw in Coldcard hardware wallets allowed an attacker to drain approximately $70 million in Bitcoin over the span of roughly 40 minutes.

Coldcard wallet flaw drains $38M in bitcoin in 25 minutes

A flaw in the key generation process of Coldcard Mk3 hardware wallets allowed an attacker to drain roughly 594 bitcoin — worth about $38 million — from around 500 wallets in under 30 minutes early Friday, in one of the…