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SecondFi's user losses may exceed 20 million dollars

Chaincatcher • June 24, 2026

Regarding the recent security incident of the Cardano ecosystem project SecondFi, Slow Mist founder Yu Xian stated: "I am actually quite unfamiliar with the Cardano ecosystem. I observed for a whole night, but if the addresses starting with addr1q are both hacker addresses (which they should be based on behavior), the losses for SecondFi users should exceed 20 million dollars (over 129 million ADA and other tokens stolen)."

Previously, it was reported that SecondFi disclosed that the security incident affected approximately 16 million ADA, with the issue originating from the web wallet generation software.

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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 Exploit Results in Over $20 Million Loss for Cardano Users SecondFi, a Cardano wallet project, suffered a significant security breach due to vulnerabilities in its wallet generation software. The exploit compromised approximately 178 wallets, leading to confirmed losses of around 16 million ADA, valued at approximately $2.4 million. Security firm SlowMist estimates total potential losses could exceed $20 million, potentially affecting up to 129 million ADA and other tokens. Following the incident, SecondFi suspended services and urged users to migrate their funds to new wallets. The platform is conducting an independent technical audit to assess the full impact and has reported secondary scams targeting affected users. No compensation timeline has been disclosed, and the community is awaiting further updates from SecondFi and Emurgo, its parent organization. The breach raises serious concerns about wallet security within the Cardano ecosystem. 25 sources 66

SecondFi's user losses may exceed 20 million dollars

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