Poloniex hot wallets on Ethereum, Tron, and Bitcoin were compromised on 10 November 2023, causing losses estimated between roughly $114 million and $132 million and triggering reimbursement, asset-freezing, and bounty measures by the exchange. CertiK described the event as a major private-key compromise with funds laundered through hundreds of wallets, while SlowMist-linked reporting assessed the swift, professional attack as likely tied to North Korea's Lazarus Group.