More than $635 million was lost to crypto exploits in April 2026 across 28 separate incidents, according to the source. The figure made April the worst month of the year so far for crypto-related security breaches. In the digital asset market, an exploit typically refers to an attack that takes advantage of a vulnerability in blockchain infrastructure, smart contract (self-executing blockchain code), wallets, bridges, or related platforms, often leading to rapid losses and renewed scrutiny of platform security practices.