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Yearn yUSDT Vault Exploit

Exploit
Yearn • yUSDT0x0d4a11d5…DDEtherscan
Date
April 13, 2023
Est. Loss
$11.54M
Chain
eth
Direct vault exploit
Yes

Taxonomy (scoring alignment)

Category: vault contractMechanism: logic errorMaps to: code, upgrade, centralization
Affected assets: USDT, DAI, USDC, BUSD, TUSD
Flash loan attack on legacy yUSDT vault. Misconfiguration used wrong Fulcrum token address (iUSDC instead of iUSDT), allowing attacker to mint 1.2 quadrillion shares and drain ~$11.5M in stablecoins via Curve.
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