Coldcard Hardware Wallet Bitcoin Exploit Causes $88 Million Drain

A newly discovered Bitcoin exploit targeting the Coldcard hardware wallet has resulted in the theft of $88 million worth of funds over the past two months.

Coldcard Vulnerability: Technical Depth and Scope

Researchers identified that attackers are abusing a reset flaw in Coldcard firmware, granting unauthorized access to sections where private keys are stored, enabling wallet emptying.

Attackers' Playbook: Operational Steps

■A dedicated group modified open‑source tools to bypass Coldcard's security layer.

■Multiple wallets were targeted simultaneously, draining balances across accounts.

■Funds were swiftly routed through a dark‑net channel.

Market Reaction and Risk Assessment

Bitcoin trades near $63,366, while security concerns in the crypto space continue to rise. Analysts warn that similar attacks could threaten other hardware wallets, urging investors to reassess their custodial strategies.

■Total loss: $88 million

■Number of affected wallets: 12+ (estimated)

■Percentage of funds moved to dark web: 70%

■Coldcard response: Emergency firmware update planned

Cem Talu – Blockchain researcher and crypto investor: This exploit undermines confidence in hardware wallets. Developers must tighten firmware audit processes, and users should keep devices updated. Moreover, employing multi‑signature and cold‑storage strategies is essential to mitigate risks arising from a single compromised device.