On August 2021, Poly Network was exploited in a bridge exploit, resulting in approximately $611 in losses. That makes the Poly Network exploit the 444th largest DeFi incident out of 690 documented in our archive.
Once the attack was discovered, Poly Network disclosed the incident to the public and asked for the help of the cryptocurrency community, begging mining platforms and exchanges to track the hacker’s movements and freeze their accounts
Attack Mechanics: How the Poly Network Bridge Exploit Played Out
Exploit Class Applied to Poly Network
The Poly Network incident on August 11, 2021 is classified as a Bridge Exploit. A cross-chain bridge is tricked into minting or releasing funds on the destination chain without a valid deposit on the source chain. In the full archive, Poly Network is 1 of 5 documented bridge exploit incidents.
Poly Network in Context
At $611, the Poly Network exploit is a minor (<$1M) event compared to the largest same-class incident in our archive — Li.Fi (2022) at $570K.
Poly Network Vulnerability Signature
The primary source categorises the Poly Network exploit specifically as “Bridge, getting around modifier through cross-chain message”. This narrower label is entity-specific: it reflects how the Poly Network contract failed, rather than the broad bridge exploit pattern alone.
Impact & Recovery for Poly Network
Poly Network Loss Figure
The Poly Network exploit caused $611 in losses — a minor (<$1M) incident and the 10th largest of 37 documented in 2021.
Where Poly Network Sits Among Bridge Exploit Attacks
Ranked by loss size, Poly Network is the 3rd largest of 5 bridge exploit incidents documented. That puts the Poly Network loss below the class average of $114.3K.
Timeline Since the Poly Network Incident
The Poly Network exploit occurred 4.7 years ago (1,707 days). The contract, its fork-block, and the attack transaction remain on-chain and forensically reproducible.
Primary Reference for Poly Network
Public post-mortem / on-chain analysis for the Poly Network incident: view source. Secondary narrative coverage: Hacker steals $600 million from Poly Network in biggest ever cryptocurrency hack.
FAQ
How much did Poly Network lose?
The Poly Network exploit in August 2021 resulted in $611 in losses — the 10th largest of 37 DeFi incidents that year.
When did the Poly Network hack happen?
The Poly Network exploit was recorded on August 11, 2021 — 1,707 days ago.
What type of exploit hit Poly Network?
The Poly Network incident is classified as a Bridge Exploit. A cross-chain bridge is tricked into minting or releasing funds on the destination chain without a valid deposit on the source chain.
How common is the Bridge Exploit pattern seen at Poly Network?
Our archive contains 5 documented bridge exploit incidents. The Poly Network incident is one of them.
How does Poly Network compare to the largest Bridge Exploit attack?
The largest bridge exploit incident in our archive is Li.Fi (2022) at $570K. The Poly Network loss is $611.
What challenges do traditional anti-fraud methods face that GNNs and blockchain aim to overcome?
Traditional methods struggle with the complexity and dynamism of modern financial fraud.
What is the role of simulated annealing in the proposed attack method?
To approximate the global optimum of the adversarial example search without gradient estimation.