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Security researcher Dustin Dettmer traces COLDCARD firmware commits behind a major Bitcoin self-custody bug

AI Market Summary
A security researcher's review of COLDCARD's firmware commit history links a severe self-custody flaw to specific code changes, raising operational risk for bitcoin holders relying on the device for cold-storage signing. While not a protocol-level issue and not impacting other tokens, the disclosure can pressure risk sentiment around hardware wallets, drive heightened scrutiny of firmware integrity, and increase near-term caution among BTC self-custody users.
Impact level
● Medium
Affected assets
BTC/USDT+1.15%
AI Insight · BTC/USDTAI Insight
▼ Bearish
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Security researcher Dustin Dettmer traced the COLDCARD hardware wallet’s firmware commit history to confirm how a flaw was introduced that has been described as one of the most serious bugs in Bitcoin self-custody in recent years. The issue directly affects users’ ability to maintain full control over their private keys. It also threatens the security of cold storage built on Bitcoin’s UTXO model, according to Dettmer.
BTC
BTC+0.94%
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