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A new Bitcoin sweep linked to the Coldcard flaw reaches 462 suspected victim addresses (Image: Shutterstock)

Coldcard Attack Accelerates As Suspected Fourth Wave Reaches 462 Wallets

A suspected fourth attack wave moved nearly 389 Bitcoin (BTC) from 462 addresses linked to Coldcard’s firmware flaw, Galaxy Research said Monday. Key Points: Researchers identified 218 transactions that moved about 388.93 BTC from 462 suspected victim addresses. Earlier confirmed waves had already d

A $70M Bitcoin theft tied to Coldcard firmware pushed Ledger and Trezor to insist their own hardware wallets are unaffected. (Image: Shutterstock)

Trezor Rules Out Coldcard Flaw, But Warns Some Users Remain Exposed

Ledger and Trezor told users their funds are safe after a firmware flaw in rival Coldcard wallets enabled a $70 million Bitcoin (BTC) theft in 41 minutes. Key Points: Ledger, Trezor, Bitkey, Jade and Tangem said the Coldcard firmware flaw does not touch their devices. Attackers drained 1,082.65 BTC

A five-year Coldcard flaw enabled a $70 million Bitcoin theft without physical access to the devices. (Image: Shutterstock)

Coldcard Loses $70M In 41 Minutes As CZ Warns Hardware Wallets Can Fail

A firmware flaw in Coldcard wallets enabled attackers to steal $70 million in Bitcoin (BTC), prompting Changpeng Zhao to warn that cold storage is not fail-safe. Key Points: Researchers traced 1,082.65 BTC from 1,196 wallets during a 41-minute sweep on Jul. 30. CZ advised holders to divide funds acr

Weak wallet seeds put Coldcard users at risk after 594.5 BTC was swept from 500 addresses. (Image: Shutterstock)

Coinkite Warns Coldcard Mk3 Owners: Every Seed Since March 2021 May Be Predictable

Coinkite warned Coldcard Mk3 users to move funds following a 594.5 Bitcoin (BTC) sweep from 500 addresses and evidence of weak seed generation. Key Points: Every Mk3 firmware release since version 4.0.1 may have generated vulnerable seeds. Mk4, Mk5 and Q users with older firmware must update their d

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