Wault Finance Flash-Loan Drain

In June 2021, the BNB Chain protocol Wault Finance lost approximately $1 million to a flash-loan manipulation of the WUSD/WEX pricing its mint/redeem logic relied on. The attacker skewed the pool, minted/redeemed at the manipulated rate, repaid the loan, and walked.

What happened

Wault's stablecoin/reward pricing read manipulable pool state. A flash loan distorted it; the attacker extracted ~$1M via skewed mint/redeem.

Why it matters

Wault Finance is one more BSC-2021 flash-loan oracle data point (Spartan, PancakeBunny, AutoShark, Belt). Its only distinctive contribution is density: BSC's mid-2021 growth window produced this identical bug class weekly, across dozens of fast forks, every one of them avoidable with the freely-available 2020 defense. The catalogue's BSC-2021 cluster is the single strongest illustration of "a hype-driven fork wave re-running the same prior month's mistake faster than any post-mortem can propagate."