On August 10, 2021, an attacker drained approximately $612 million from Poly Network, a cross-chain interoperability protocol, in what was at the time the largest decentralized finance exploit on record,...
Summary
- What Happened in the Poly Network Hack The documented loss was approximately $612 million, not $6.4 billion, according to Chainalysis on-chain analysis of the August 2021 incident.
- The $6.4 billion figure circulating in some coverage refers to a separate, later event involving a different entity entirely; conflating the two understates the significance of either incident and misleads users trying to assess cross-chain bridge risk.
- Documented Poly Network loss $612 million Chainalysis reported this amount stolen in the August 2021 cross-chain exploit.
- Poly Network was designed to facilitate asset transfers across multiple blockchains, including Ethereum, Binance Smart Chain, and Polygon, by maintaining smart contracts on each chain that could authorize and verify cross-chain movements.
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