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SecondFi wallet hack steals $2.4M in ADA but Cardano price holds steady

Pluang • July 22, 2026

Cardano wallet provider SecondFi announced it will shut down its services, including the Yoroi wallet it managed, following a security breach that led to the theft of $2.6 million worth of ADA from 374 wallets. Attackers exploited a flaw that a...

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This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

SecondFi Wallet Shutdown After $2.6M Theft Due to Signing Flaw SecondFi, a Cardano wallet, announced its shutdown after a security breach allowed attackers to steal 16.1 million ADA, valued at approximately $2.6 million. The attack exploited a signing flaw in the wallet's software, which was introduced in a June 8 update. This flaw enabled the private keys of 374 user wallets to be exposed through public blockchain data. An independent investigation suggested links to North Korea's Lazarus Group, although no formal attribution has been confirmed. Users are currently awaiting recovery tools, which are expected to be released in August. The incident marks a significant failure in Cardano's application-layer security, raising concerns about similar vulnerabilities in other blockchain systems. SecondFi will not resume operations, and no reimbursement plan has been announced. 2 sources 71

SecondFi wallet hack steals $2.4M in ADA but Cardano price holds steady

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