So it's my understanding that insecure CDN downloaders had been floating around, and so in the interest of discouraging people from running potentially dangerous code, I'll make this release thread for my implementation.
This implementation uses the same routines the console does in grabbing NCAs, as well, there are settings you can enter to aid in anti-detection.
As with most things, use with caution as there's no 100% safety guarantee.
Also this is very much so a work-in-progress! I don't have enough time in the day to work on it constantly so PRs are welcome.
Source: https://github.com/Reisyukaku/CDNX
Release: https://github.com/Reisyukaku/CDNX/releases