Synopsis
The remote host is configured with default or easily-guessed credentials.
Description
The remote host is running an SNMPv2 server that uses a well-known community string - rmon.
Solution
This signature was obtained through direct sniffing of the network, so if possible, migrating systems to SNMP v3 would be more secure. For non-local attacks though, your community string is easily guessed and should be changed to something more random.