Leaderboard
625All-time rank
N
NowSwap
Sep 15, 2021
$1.1M
Lost
$1.1M
Recovered
$0
Net loss
$1.1M
Unrecovered0% recovered
NowSwap DEX on Ethereum was exploited on September 15, 2021 when K constant value mismatch (updated in 2 of 3 code locations during upgrade) allowed attacker to swap 1 wei for 98% of pool reserves.
How the exploit worked
View reproducible PoCIncorrect calculation.
Lost: 158.28 WETH and 535,706 USDT
Source: DeFiHackLabs (SunWeb3Sec)
- Target
- DeFi
- Classification
- Token & Share Accounting
- Technique
- Arithmetic Error
- Attribution
- Unknown
- Chains
Ethereum
Event timeline
- Sep 15, 2021Exploit executed — $1.1M drained via arithmetic error
- Attributed to Unknown
- Recovery status Unrecovered 0%
Data credits
- DefiLlamaIncident record, amounts, chains, recovery data and logo
- DeFiHackLabsExploit analysis and reproducible proof-of-concept (by SunWeb3Sec)