Polyhedra was exploited due to the compromise of the private keys, which resulted in a loss of 1,400,323 THENA tokens worth approximately $760,000. The contract was maliciously upgraded following the leakage of the private key of the administrator account. The exploiter swapped all of the stolen assets for 1,299 BNB tokens. According to the team, the incident resulted from intentional theft rather than a vulnerability in the contract itself.