CoinDesk

Bitcoin Hardware Wallet Flaw Drains 594 BTC in 25-Minute Sweep

July 31, 2026•02:12 AM

A critical hardware wallet randomness bug turned "impossible to guess" seeds into guessable ones, resulting in the draining of 594 BTC worth $38 million in just 25 minutes. The vulnerability exposes fundamental risks in the security architecture of widely used physical Bitcoin wallets.

This incident represents one of the largest Bitcoin breaches related to hardware flaws, highlighting the critical importance of independent security audits and firmware updates. The crypto community is closely monitoring developments as experts call for a review of random number generation protocols across the entire wallet ecosystem.

The incident occurred when a bug in the randomness generation allowed attackers to predict the private keys associated with affected wallets. In a span of just 25 minutes, intruders managed to transfer the funds to wallets under their control before the vulnerability was identified and contained. Blockchain security experts are analyzing the source code of affected wallets to determine the full extent of the impact and develop security patches.

This is a summarized and adapted version by Artificial Intelligence. To read the complete original story, visit the official source.

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