Odaily News Cross-chain interoperability protocol Poly Network released a security incident investigation report on July 2. At that time, the vulnerability incident caused 58 assets on 11 chains to be affected. Analysis found that the attacker implanted a Trojan virus in the program compilation environment to obtain the consensus key of the Poly Network relay chain. They then executed fake cross-chain transactions by transferring transactions on the original chain to the attackers relay chain, manipulating the amount of assets to be unlocked on the target chain. The attacker then transfers the transactions on the relay chain to the target chain. The target chain contract verifies the signature of the relay chain, causing the corresponding modified asset amount to be released to the attackers wallet address.