SecondFi Cardano Wallet Exploit: Flaw in Proprietary Key Generation Software Drains ~16M ADA

ahboyashreads (@ahboyashreads), Jun 25, 2026, 04:28 UTC

SecondFi Cardano Wallet Exploit: Flaw in Proprietary Key Generation Software Drains ~16M ADA Even wallets can't be trusted now Summary of events • June 21: The exploit began from a defect in SecondFi’s proprietary wallet generation software (weak randomness in private key creation). This allowed them to derive private keys for affected wallets. Drained funds from ~198 wallets (~12.3M ADA stolen) • June 23: Second wave swept ~2,874 additional wallets, funneling ~129.4M ADA into a single dormant vault address. Root cause was a flaw isolated to their native Cardano web wallet generation soft…

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