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Coldcard Security Vulnerability Explained: $89M Bitcoin Drain & How to Protect Your Wallet
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An critical security vulnerability in Coldcard hardware wallet firmware (PRNG bug / Yasmarang PRNG) resulted in nearly $89 million in Bitcoin being drained across thousands of wallets. In this video, we cover: The Vulnerability: How low-entropy seed generation compromised Coldcard models (MK2, MK3, MK4, MK5, and Q). Immediate Action Needed: Why firmware updates alone won't fix weak seeds, and how to safely migrate your funds to a new wallet. Best Practices: How to use dice rolls for true 256-bit hardware entropy and avoid critical multisig redundancies.
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Analysis last updated August 23, 2026 · Read the methodologyRead the creator’s original video description
An critical security vulnerability in Coldcard hardware wallet firmware (PRNG bug / Yasmarang PRNG) resulted in nearly $89 million in Bitcoin being drained across thousands of wallets. In this video, we cover: The Vulnerability: How low-entropy seed generation compromised Coldcard models (MK2, MK3, MK4, MK5, and Q). Immediate Action Needed: Why firmware updates alone won't fix weak seeds, and how to safely migrate your funds to a new wallet. Best Practices: How to use dice rolls for true 256-bit hardware entropy and avoid critical multisig redundancies.