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269All-time rank
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BurgerSwap

May 28, 2021

$7.2M
Lost
$7.2M
Recovered
$0
Net loss
$7.2M
Unrecovered0% recovered

2M in BURGER, WBNB, and USDC. Missing code line in Uniswap V2 fork enabled reentrancy.

Attacker created a fake token to manipulate price, then executed profitable swaps funded by a PancakeSwap flashloan.

How the exploit worked

View reproducible PoC

Mathematical flaw + Reentrancy.

Source: DeFiHackLabs (SunWeb3Sec)

Target
DeFi
Classification
Reentrancy
Technique
Reentrancy
Attribution
Unknown
Chains
BSC

Event timeline

  1. May 28, 2021
    Exploit executed — $7.2M drained via reentrancy
  2. Attributed to Unknown
  3. Recovery status Unrecovered 0%

Data credits

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