Coldcard Hardware Wallet Security Breach
Hardware wallets carry security vulnerabilities that can compromise Bitcoin private keys, making no storage solution entirely foolproof
Too little corroboration in the last 3 days to call a trend (33 articles). Watching for it to gain traction.
Still mostly niche and specialist coverage — not yet picked up broadly by mainstream press.
"On some affected devices, the flaw reduced security from 128 bits of entropy to roughly 40 bits, making wallet seeds easier for attackers to guess without physical access to the device. All told, the Coldcard exploit has now resulted in roughly $130 million in stolen Bitcoin and raised questions about entropy"
"A subsequent analysis of the flaw detailed four suspected attack waves that removed an estimated 1,816 BTC from more than 5,200 addresses."
"An attacker who generated possible seeds could derive their Bitcoin addresses and compare them with public blockchain records. Finding a match would provide the private keys needed to transfer the funds without obtaining the physical device, learning its PIN, or attacking the Bitcoin network."
"BitBox, the Zurich-based maker behind the BitBox02, released the Dixence security update this week after its own engineers uncovered two severe flaws in the cryptocurrency wallet's firmware. It's another reminder that hardware wallets, long considered the ideal choice for security-conscious crypto users, aren't bulletproof."
"The Coldcard Bitcoin exploit showed how a five-year-old firmware bug let thieves drain roughly 1,596 BTC, the largest hardware-wallet hack of 2026. Days ago, the data breach of hardware wallet maker SafePal stoked fresh fears of so-called wrench attacks on wallet owners whose personal details, including physical addresses, were exposed."
"Attackers exploited a vulnerability in the firmware of Coldcard hardware wallets to drain funds from numerous Bitcoin addresses, sparking widespread concern regarding the security of hardware wallets and the risks associated with self-custody of digital assets."
"Previous research from Galaxy found that the typical stolen coin had sat untouched for 3.5 years, and a striking 88% of pilfered funds were at least a year old."
"Galaxy Research said that, with the help of reports from victims, it had identified at least 33 additional attacker footprints beyond Waves 1, 2 and 3... We can say with high confidence that multiple attackers were active in the threat environment and exploiting the Coldcard vulnerability."
"Hardware wallets are designed to keep cryptocurrency keys secure and away from online threats. However, flaws in the technology used to generate these keys can put funds at risk as seen in a recent attack targeting some Coldcard wallets."
"A 2021 firmware update quietly rerouted Coldcard's seed generation off its hardware random-number chip and onto a software stand-in, collapsing key strength from 128 bits to as low as 40. Attackers could rebuild seeds from a device's serial number and clock state, then sweep the coins without resorting to phishing or malware techniques and even without physical access to the actual devices."