A CWE-798 "Use of Hard-coded Credentials" was discovered affecting the following devices manufactured by Advantech: EKI-6333AC-2G (<= 1.6.3), EKI-6333AC-2GD (<= v1.6.3) and EKI-6333AC-1GPO (<= v1.2.1). The vulnerability is associated to the backup configuration functionality that by default encrypts the archives using a static password.