Crimes and Fraud News

SecondFi on Cardano Hacked for $20M — How Bad Is It and What Users Should Do

Nana K.
24 June 2026 3 min read

The SecondFi project in the Cardano ecosystem has been hit by a major hack linked to a flaw in its proprietary wallet generation software. We break down what happened.

Analysts estimate losses from the SecondFi exploit could exceed $20M. The team has confirmed the vulnerability is at the address level and does not affect Cardano’s (ADA) base protocol.

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The Cardano protocol itself was not compromised–the issue is localized to the project’s tooling.

Users are strongly advised not to recover their seed phrases into other wallets and to wait for official instructions.

Contents
  1. 1.Scale of the SecondFi Incident: 16 Million to 129 Million ADA Lost
  2. 2.Community Reaction and SecondFi's Warnings
  3. 3.How the Crypto Market Reacted to the SecondFi Hack: ADA Price in Decline

Scale of the SecondFi Incident: 16 Million to 129 Million ADA Lost

SecondFi’s internal estimate is about 16 million ADA$0.1456. However, SlowMist analysts, including founder Yu Xian, estimate losses at more than 129 million ADA and additional tokens worth over $20 million. At ADA’s current price, SlowMist’s upper estimate is roughly $19.4M. The discrepancy comes from the fact that compromised crypto wallets held not just ADA but other tokens as well.

The attack was made possible by a vulnerability in SecondFi’s proprietary wallet generation software, which gave attackers access to user funds. SecondFi has conducted on-chain analysis to identify affected addresses and brought in an independent blockchain security firm for a technical audit. 

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Community Reaction and SecondFi’s Warnings

SecondFi has warned users:

The team is asking all affected users to submit claims through support.secondfi.io and promises to publish mitigation steps.

Cardano founder Charles Hoskinson commented on the incident, noting that while the losses may seem small compared to other hacks, that’s little comfort to affected users. He emphasized that some may have lost all their ADA and called it “the sad reality of the industry.

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How the Crypto Market Reacted to the SecondFi Hack: ADA Price in Decline

ADA is trading near five-year lows, and the SecondFi hack news adds further pressure on the ecosystem. At the time of publication, ADA trades at roughly $0.1471, down 3.6% on the day. The weekly decline has already exceeded 13%.

ADA Price Movement Over 24 Hours, as of June 24, 2026. Source: CoinGecko.
ADA Price Movement Over 24 Hours, as of June 24, 2026. Source: CoinGecko.

Cardano’s market cap continues to slide, even though the incident did not affect the base protocol. Investors and traders will be watching the independent audit closely, which will determine the final loss amount and the possibility of fund recovery.

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