Versions of Cisco Network Services (CNS) NetFlow Collection Engine (NFC) prior to 6.0 create and use default accounts with identical usernames and passwords. An attacker with knowledge of these accounts can modify the application configuration and, in certain instances, gain user access to the host operating system.
The upgrade to NFC version 6.0 is not a free upgrade. This default password issue does not require a software upgrade and can be changed by a configuration command for all affected customers. The workaround detailed in this document demonstrates how to change the passwords in 5.0.