Coldcard Security Upgrade Strengthens Seed Phrase Generation
12 Articles
12 Articles
Coldcard Releases Security Firmware After $130M Bitcoin Exploit
Coldcard maker Coinkite has released a major security firmware update after attackers exploited weak seed generation to steal more than 1,778 BTC from thousands of Bitcoin addresses, with earlier estimates placing the broader attack near $130 million. The August 20 release introduces firmware 5.6.1 for Mk4 and Mk5 and 1.5.1Q for Q, following three weeks of security review after the July 31 hotfix. Every newly generated seed now requires users to…
Coldcard Forces New Seed Rules After $130M Bitcoin Exploit
Summary: Coldcard now requires users to contribute randomness when creating new seeds. The seed-generation flaw could reduce effective security to […] The post Coldcard Forces New Seed Rules After $130M Bitcoin Exploit appeared first on CoinsPress.
On August 20, 2026, Coinkite delivered the firmware versions 5.6.1 for the Coldcard models Mk4 and Mk5 and 1.5.1Q for the Q model. Those who own a Coldcard must therefore keep two things apart: The update closes the gap for everything that you are starting to create from now on. It does not repair a seed that has been created on an incorrect version. For this seed, only the move to a newly created recovery phrase remains. The manufacturer explic…
CoinStats - Coldcard Ships Firmware After $114M Bitcoin T...
The difference between a patched wallet and a safe wallet is not always obvious. Coldcard has shipped new firmware after a $114 million bitcoin theft tied to a flaw in its hardware wallet, and the company is drawing that line explicitly. According to the original report, the update follows three weeks of review that uncovered additional bugs unrelated to the original exploit. But installing the firmware does not make an already compromised walle…
Coldcard Adds New Security Measures After $130M Bitcoin Exploit
Coldcard is rolling out new security measures after a $130 million Bitcoin exploit, moving to shore up trust in one of self-custody’s best-known hardware wallets after a loss of that scale put its users on edge. What Happened in the $130 Million Bitcoin Exploit The catalyst was a Bitcoin exploit that drained roughly $130 million, reported by Decrypt, and it landed squarely on a corner of the market that markets itself on safety. For related cove…
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