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Hackers exploit Coldcard flaw, steal $89M in Bitcoin from thousands of wallets

Market News
02 Aug 2026
Crypto Briefing
View Source
Bearish
pluang ai news

A firmware flaw in Coldcard hardware wallets allowed hackers to reconstruct private keys offline, stealing about 1,367 BTC worth nearly $89 million from 4,585 addresses starting July 30, 2026. The vulnerability originated from a 2021 firmware bug that used a less secure software random number generator instead of hardware-based entropy, making key reconstruction possible. Coinkite released a patch by August 1, 2026, urging users to migrate funds if affected. This incident highlights risks in hardware wallet firmware and has led some users to move Bitcoin back to centralized exchanges for perceived safety.

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