- SecondFi’s wallet generation software was exploited, draining roughly 16 million ADA (~$2.4 million).
- The company claimed the issue impacted a small number of Cardano wallets and has paused its front-end.
- Developer Blink Labs warned that wallets generated by the software are “all unsafe” and should be replaced.
- SecondFi states an independent review is being finalized and not all users may be fully compensated.
A self-custody “neofinance” platform called SecondFi was exploited on June 23, 2026, leading to the theft of an estimated $2.4 million in Cardano (ADA). The company first alerted users to a security issue impacting its Cardano wallet services this morning.
Consequently, SecondFi placed its services into maintenance mode to contain the problem. The platform later shared an update diagnosing the root cause as a flaw in its native Cardano web wallet generation software. It has taken “extraordinary steps to protect remaining assets where possible,” hinting some users may not be made whole.
Meanwhile, the firm is finalizing an independent technical review with a leading blockchain security firm. Software developer Blink Labs has directly warned that “the wallets generated are all unsafe.” Users were advised to switch to another wallet immediately for their security.
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