Multi-OS/Application Security Patch Fetcher

I need a tool using Microsoft Powershell that can fetch security patches and patch release information from the internet for various OS levels and applications using vendor websites. The tool should be able to download the patches and store them locally along with information about the patch such as release patch source, OS type, software impacted, software name, software description and the patch name and severity level.

Key requirements:
- Fetching security patches for various OS levels and applications using vendor websites.
- Downloading patches for specific applications only.
- Storing the downloaded patches locally.
- Collect patch information patch source, OS type, software impacted, software name, software description and the patch name and severity level
- collect security hash from website and compare hash to ensure patch was not tampered with during download and output all of this data within the CSV file
- export All data in CSV file