An undocumented test interface in the TCP service listening on port 32764 of the affected device could allow an unauthenticated, remote attacker to gain root-level access to an affected device. Cisco indicated that they will be releasing free updates for the affected product. The products in question are: RVS4000 4-port Gigabit Security Router running firmware version 2.0.3.2 and. WAP4410N Wireless-N Access Point running. Version 2.6.1 and prior version 1.1.13.”]
Source: https://www.csoonline.com/article/2136221/cisco-confirms-undocumented-backdoor.html