zkSync, an Ethereum scaling solution, faced a major security breach on April 15, 2025. Despite compromising an admin wallet, the team swiftly addressed the issue with their security partner SEAL. The incident highlighted the importance of security in Layer-2 protocols and transparency in airdrop mechanisms. The hacker returned 90% of the stolen tokens after accepting a bounty offer, illustrating a unique resolution to the attack. The incident showcased both the risks and potential solutions within decentralized finance systems.