An issue was discovered in a smart contract implementation for EUC (EUC), an Ethereum token. The contract has an integer overflow. If the owner sets the value of buyPrice to a large number in setPrices() then the "msg.value * buyPrice" will cause an integer overflow in the fallback function.

The mintToken function of a smart contract implementation for EncryptedToken (ECC), an Ethereum token, has an integer overflow that allows the owner of the contract to set the balance of an arbitrary user to any value.