score:3
This forum post outlines a 2E to 2C trip:
Another post in the other direction mentions explicitly you need to pass security:
take the airside bus that goes from 2C, to 2A, 2B, 2F and then S3, one 2E's boarding areas, and finally 2E's main boarding area; as the bus circles around CDG2 clockwise, you have the longest possible airside transfer. You will not go through any immigration check, but you will need to clear security when entering the boarding area.
Upvote:3
The source of your image contains some conditional text below the image:
β Proceed to your boarding gate.*
* Via Immigration/Passport control if you are transferring to a Schengen flight at terminal 2D or 2F.
Since you're transferring to a non-Schengen flight at terminal 2E, the immigration checkpoint does not apply to you.