DeBox's operating account private key was leaked, resulting in the theft of 31.03 $ETH and 4.879 million BOX. The company assured users that their assets are secure. The response plan includes a Stability Fund buyback of stolen tokens, allocation of repurchased tokens to the BOX DAO asset pool, an upgrade to account security with multi-signature login, and an investigation by a professional security company. DeBox will track stolen addresses and may take legal action, while continuing to build a transparent ecosystem.