Internet reports that in 2022, a hacker involved in exploiting a $4.67 million vulnerability in the decentralized financial lending protocol Voltage Finance transferred part of the stolen Ethereum to Tornado Cash after a brief dormant period. Blockchain security company CertiK posted on X on May 6 that 100 Ethereums, worth $182,783 at current prices, were transferred from a different address originally used for exploit, but can be traced back to hackers. In March 2022, explorers took advantage of a "built-in callback function" in the ERC677 token standard, allowing them to exhaust the platform's lending pool through a reentry attack.