Phlox com.phlox.simpleserver (aka Simple HTTP Server) 1.8 and com.phlox.simpleserver.plus (aka Simple HTTP Server PLUS) 1.8.1-plus have a hardcoded aKySWb2jjrr4dzkYXczKRt7K (AES) encryption key. An attacker with physical access to the application's source code or binary can extract this key & use it decrypt the TLS secret.
VR-S1000 firmware Ver. 2.37 and earlier uses a hard-coded cryptographic key which may allow an attacker to analyze the password of a specific product user.
IBM MaaS360 for Android 6.31 through 8.60 is using hard coded credentials that can be obtained by a user with physical access to the device.