Synopsis
The physical network is set up in a potentially insecure way.
Description
The remote host is on a different logical network than the Nessus scanner. However, it is on the same physical subnet.
An attacker connecting from the same network as your Nessus scanner could reconfigure his system to force it to belong to the subnet of the remote host.
This may allow an attacker to bypass network filtering between the two subnets.
Solution
Use VLANs to separate different logical networks.
Plugin Details
Configuration: Enable thorough checks
Supported Sensors: Nessus