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Coldcard Bitcoin Theft Ongoing: Is Your Wallet Affected?

Coldcard Bitcoin Theft Ongoing: Is Your Wallet Affected?

A firmware error has disabled secure random number generation across multiple Coldcard hardware wallet generations, fueling an ongoing theft that has already drained 594.48 Bitcoin (BTC), worth about $38.3 million.

Coldcard maker Coinkite and Block’s Bitcoin engineering team traced the bug to a broken random number generator (RNG) check. As a result, attackers can rebuild a wallet’s private keys using predictable device details instead of true randomness.

Coldcard Bitcoin Theft: How It Happened Coldcard’s firmware turns off the chip’s built-in randomness generator. Instead, a backup system builds wallet keys from the device’s serial number and its internal clock.

Both follow patterns an attacker can guess, turning a supposedly random seed into a solvable puzzle. Devices running certain firmware released since 2021 get almost no real randomness at all. Newer models add a partial fix.

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Yes, most public blockchains (like Bitcoin and Ethereum) are transparent. Transactions can be traced back to public keys and wallet addresses, meaning that while they are pseudonymous (names are not directly tied to addresses), they are not completely anonymous.

TRADEMINATI X is an automated real-time cryptocurrency news aggregator. It fetches and analyzes RSS feeds, organizing publications by coin hashtags to make tracking specific assets efficient.
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