On August 8, 2021, Zerogoki was exploited for approximately $670K when an attacker provided a price oracle signed by legitimate private keys but containing crafted token swap amounts, bypassing normal validation and allowing unauthorized fund extraction.

BachOnChain, a core member of Duet Protocol, a multi-chain synthetic asset protocol, tweeted that the Duet Protocol pioneer network Zerogoki experienced an oracle attack a few hours ago, and the wrong price led to unrecognized transactions. BachOnChain said that the oracle has been suspended, zUSD has experienced certain fluctuations, and it is expected that the price will resume in market trading and arbitrage after a period of time.