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$70M Bitcoin stolen from 1,196 Coldcard wallets via RNG flaw before public alert

Market News
31 Jul 2026
Crypto Briefing
View Source
Bearish
pluang ai news

Attackers exploited a random number generator flaw in Coldcard Mk3 firmware to drain 1,082.65 BTC (about $70.2 million) from 1,196 wallets in just 41 minutes, shortly before the vulnerability was publicly disclosed. The flaw made wallet recovery seeds predictable, allowing attackers to calculate private keys and steal funds. The attack targeted long-dormant wallets, suggesting victims were long-term holders. Users are urged to check firmware versions and generate new recovery seeds immediately to protect their assets.

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