SecondFi, one of the key wallet providers in the Cardano ecosystem, has confirmed that a sophisticated security breach between June 21 and June 23, 2026, affected a total of 374 wallet addresses. The incident resulted in the theft of approximately 16 million ADA, which equates to about $2.4 million at current valuations. EMURGO, one of Cardano’s founding organizations, responded by announcing an official compensation process, stating its intent to fully reimburse all users impacted by the breach.