A privilege violation detecting program stored on a computer-readable medium causes a computer to detect a privilege violation of an test target program by receiving an authority request API from an authority request API trace log storing unit; reading out, from an object access rule storing unit, an assumed access API assumed to be output in response to the received authority request API; determining an actual access API returned in response to the received authority request API from the actual access API trace log storing unit; and storing, into a least privilege violation data storing unit, data of the received authority request API when the actual access API returned in response received authority request API does not match the read out assumed access API.