DeFi Protocol USDT0 Flagged High-Risk in Security Audit with 21 Vulnerabilities

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A senior DeFi security research team published an audit report on September 15, 2026, reviewing USDT0, a yield-aggregation protocol managing approximately $3.08 billion in total value locked across Ethereum and multiple Layer-2 networks. The audit assessed six core smart-contract components along with off-chain systems including oracle feeds and governance timelocks, covering the latest mainnet deployment version 2.3.1. Researchers identified 21 vulnerabilities in total, including 4 critical issues spanning re-entrancy attacks, improper access controls, unchecked token transfer return values, and unsafe delegatecall usage. The protocol received an overall risk score of 7.4 out of 10, placing it in the high-risk category. Auditors warned that if left unaddressed, these vulnerabilities could result in partial or total loss of user funds and significant reputational harm to the platform.

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