To remediate the misconfiguration “EC2 Instances Should Not Be Overutilized” for AWS, you can follow the below steps using AWS CLI:

1. Identify the overutilized EC2 instances using the CloudWatch metrics. Run the following command to get the CPU utilization of all the EC2 instances in your AWS account:

   aws cloudwatch get-metric-statistics --namespace AWS/EC2 --metric-name CPUUtilization --dimensions Name=InstanceId,Value=<instance_id> --start-time <start_time> --end-time <end_time> --period 300 --statistics Maximum
   

   Replace <instance_id> with the ID of the EC2 instance you want to check, <start_time> with the start time of the period you want to check, and <end_time> with the end time of the period you want to check.

2. Once you have identified the overutilized EC2 instances, you can either upgrade the instance type or add more instances to the auto-scaling group. To upgrade the instance type, stop the instance and then change the instance type from the AWS Management Console or by running the following command:

   aws ec2 modify-instance-attribute --instance-id <instance_id> --instance-type <instance_type>
   

   Replace <instance_id> with the ID of the EC2 instance you want to modify and <instance_type> with the new instance type you want to use.

3. If you want to add more instances to the auto-scaling group, run the following command:

   aws autoscaling update-auto-scaling-group --auto-scaling-group-name <auto_scaling_group_name> --min-size <min_size> --desired-capacity <desired_capacity> --max-size <max_size>
   

   Replace <auto_scaling_group_name> with the name of the auto-scaling group you want to modify, <min_size> with the minimum number of instances you want to have in the group, <desired_capacity> with the desired number of instances you want to have in the group, and <max_size> with the maximum number of instances you want to have in the group.

4. After you have made the necessary changes, monitor the CPU utilization of the EC2 instances using CloudWatch metrics to ensure that they are not overutilized.

To remediate the misconfiguration of EC2 instances being overutilized in AWS using Python, follow these steps:

1. First, you need to identify the overutilized instances. You can use CloudWatch to monitor the CPU utilization of your instances and set alarms to notify you when the utilization exceeds a certain threshold. You can also use AWS Trusted Advisor to get recommendations on overutilized instances.

2. Once you have identified the overutilized instances, you can use the AWS SDK for Python (Boto3) to stop or terminate the instances. Here’s an example code snippet to stop an EC2 instance:

import boto3

ec2 = boto3.client('ec2')

response = ec2.stop_instances(
    InstanceIds=[
        'INSTANCE_ID',
    ],
    Force=True
)

Replace ‘INSTANCE_ID’ with the ID of the overutilized instance.

3. You can also use AWS Auto Scaling to automatically adjust the number of instances in your fleet based on demand. Auto Scaling can launch new instances when demand increases and terminate instances when demand decreases, ensuring that your fleet is always right-sized.

4. Finally, you should review your instance types and consider upgrading to a larger instance type if your workload requires more resources. You can use AWS Cost Explorer to analyze your costs and identify opportunities to optimize your instance usage.