According to BlockBeats, on February 5, Arbitrum's ecological stablecoin project SperaxUSD released a report saying that yesterday morning an attacker increased the token balance of his address to 9.7 billion without providing corresponding collateral, and was able to liquidate about $300,000 before the Sperax team and Arbitrum's ecological partners jointly blocked it. The Sperax team said that it has identified the attacker's account on CEX and is contacting the attacker to discuss a solution. At present, all stablecoin USDs transactions and smart contracts have been suspended, and the vulnerability will be resolved by upgrading the smart contract next week. Before restarting the protocol, the Sperax team will recapitalize the liquidated amount.