PANews reported on May 28 that Usual said on the X platform regarding the security incident that one of Usual's USD0++ investment vaults suffered an arbitrage attack worth $43,000. The attacker abused a capped method when unpacking USD0++ into USD0 and depositing it into the investment fund. No user funds were affected, no funds were lost, and the Usual core protocol was not suspended. The affected vault will be reactivated soon.