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CryptoMediumUpdated×3•Originally published 1 August 2026•Updated 8 August 2026•
1 min read

Coldcard Firmware Exploit Leads to $70M Bitcoin Theft; CZ Issues Warning

Digital illustration of a man before a safe with Bitcoin logos, featuring a cracked hardware wallet and hack data.

Key Facts

1Binance founder Changpeng Zhao (CZ) warned of software bugs in hardware wallets after a Coldcard firmware vulnerability was linked to the theft of 1,082 Bitcoin.

Amid rising reliance on cold storage solutions for securing digital assets, new security concerns have emerged regarding the integrity of hardware wallets. Changpeng Zhao (CZ), founder of Binance, has warned of critical software bugs in hardware wallets after a firmware vulnerability in Coldcard devices was identified. According to reports, this exploit is linked to the theft of over 1,082 Bitcoin, valued at approximately $70 million.

Researchers identified a critical software bug in the firmware of these long-established hardware wallets, which allowed attackers to drain user funds. This incident raises significant questions about the perceived absolute security of cold storage, as the flaw within this specific provider has eroded trust in hardware-based security measures. The impact is currently localized to users of this specific hardware provider rather than broader exchange infrastructure.

Traders should watch for official firmware updates from Coldcard to address the identified vulnerability. Investors are also looking ahead to the US CB Consumer Confidence data on July 28, 2026, as a potential catalyst for broader market risk appetite.