BlockBrief360

A major security incident involving older Coldcard hardware wallets has shaken the Bitcoin community. According to recent investigations, attackers exploited a legacy firmware weakness that allowed them to target predictable wallet seeds, leading to the theft of approximately 1,367 BTC (around $89 million) from thousands of affected addresses.
The important takeaway is that Bitcoin itself was not compromised. Instead, the issue was linked to how some affected wallets generated recovery seeds. This highlights a key lesson in self-custody: your security depends not only on the blockchain but also on the tools you trust to protect your private keys.
If you're using a hardware wallet, now is a good time to:
Verify whether your device or firmware is affected.Update to the latest firmware if recommended by the manufacturer.Consider generating a new recovery seed and migrating funds if your wallet falls within the affected group.Review whether a multisignature setup is appropriate for your long-term holdings.
Events like this remind us that strong security requires continuous vigilance—not just buying a hardware wallet and forgetting about it.
How do you protect your long-term crypto holdings?
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#bitcoin #CryptoSecurity #SelfCustody #HardwareWallets #Web3