Insecure initial password configuration issue in SEIKO EPSON Web Config allows a remote unauthenticated attacker to set an arbitrary password and operate the device with an administrative privilege. As for the details of the affected versions, see the information provided by the vendor under [References].
The product initializes or sets a resource with a default that is intended to be changed by the administrator, but the default is not secure.
Developers often choose default values that leave the product as open and easy to use as possible out-of-the-box, under the assumption that the administrator can (or should) change the default value. However, this ease-of-use comes at a cost when the default is insecure and the administrator does not change it.