Bitcoin hardware wallet maker Coldcard said Aug. 3 that the past three days had been among the hardest in the company’s history, with some users losing savings accumulated over many years. The company said it has been contacting customers since last Friday to help them move funds that remain safe and to provide recovery guidance. Coldcard also said it has destroyed the remaining COLDCARD inventory produced with the vulnerable firmware and has halted shipments. According to the company, Satscard, Opendime and Tapsigner are not affected. A patched firmware release is now available and can prevent newly generated seed phrases from being exposed to the issue. Still, seed phrases that were generated earlier on the vulnerable firmware remain at risk. Coldcard said affected users need to create a new wallet and transfer their funds. As temporary alternatives, the company pointed users to Bitkey, Ledger, Trezor, Jade and Bitbox, and asked affected users to keep their devices to support any later recovery efforts.
Bitcoin hardware wallet maker Coldcard said on Aug. 3 that the past three days had been among the hardest in the company’s history, and that some users had seen savings built up over many years damaged.
The company said it has been in contact with customers since last Friday, helping them move funds that remain safe and offering recovery guidance.
Coldcard also said it has destroyed the remaining COLDCARD inventory produced with the vulnerable firmware and has paused shipments.
The company added that Satscard, Opendime and Tapsigner are not affected.
On remediation, Coldcard said a patched firmware version has been released. The patch can prevent newly generated seed phrases from being affected, but older seed phrases created on the vulnerable firmware still carry risk. Users need to create a new wallet and move their funds.
As temporary alternatives, Coldcard suggested Bitkey, Ledger, Trezor, Jade and Bitbox, and called on affected users to keep their devices for possible follow-up recovery efforts.
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