COLDCARD wallet RNG flaw likely linked to $88 million Bitcoin theft
Researchers discovered that a flaw in the COLDCARD hardware wallet’s firmware allowed attackers to exploit a deterministic random‑number generator, enabling offline seed reconstruction and the theft of about 1,367 BTC (≈ $88.6 million) from 4,585 compromised wallets; the first major wave of 1,083 BTC (≈ $70.2 million) was swept in a 41‑minute burst on July 30