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Public · Published
Is Any Cold Wallet Safe? Inside the Coldcard Hack's Wave Three
A firmware bug introduced into Coldcard hardware wallets in 2021 caused the device's random number generator to produce weak entropy, allowing attackers to silently create private keys and drain roughly 1,600‑2,000 BTC (about $100 million) from long‑inactive cold storage addresses.
Published:
Updated:
What happened
A firmware bug introduced into Coldcard hardware wallets in 2021 caused the device’s random number generator to produce weak entropy, allowing attackers to silently create private keys and drain roughly 1,600‑2,000 BTC (about $100 million) from long‑inactive cold storage addresses.
Confirmed
Global impact / market context
If a widely used hardware wallet can be compromised, users may lose confidence in self‑custody solutions, prompting a shift toward custodial services or more rigorous security audits, which could affect demand for Bitcoin and related security products.
Analyst inference
Bitcoin’s price has been relatively stable, but high‑profile security breaches can trigger short‑term volatility as investors reassess risk, while firms that provide hardware wallets may see increased scrutiny and potential regulatory pressure from government agencies.
Analyst inference
What to watch
- Reports of additional Coldcard devices compromised will confirm the bug’s reach and indicate whether more Bitcoin could be at risk, directly impacting holder confidence. Confirmed
- Coldcard’s release of a patched firmware version is expected to close the entropy flaw, and adoption speed will determine how quickly users can secure their assets. Proposed
- Regulators may issue guidance on hardware wallet security standards, which could raise compliance costs for manufacturers and influence investor preferences toward audited custodial solutions. Analyst inference
Affected assets
- BTC — Bitcoin