Mixin Network disclosed that attackers compromised the database of its cloud service provider on September 23, 2023, causing losses initially estimated at about $200 million on the mainnet. The team suspended deposits and withdrawals, contacted Google and a blockchain security company for investigation support, and later said the affected assets were mainly ERC20-USDT, ETH, and BTC. Mixin planned a new Mixin Safe-based system, a new Kernel mainnet version, and Messenger updates before reopening deposit and withdrawal functions after security review.