HIGH
Source
CloudSploit
ID
default-vpc-in-use

Default VPC In Use

Determines whether the default VPC is being used for launching VM instances

The default VPC should not be used in order to avoid launching multiple services in the same network which may not require connectivity. Each application, or network tier, should use its own VPC.

Move resources from the default VPC to a new VPC created for that application or resource group.