HSBC-BANK in CDG aiport

According to the Paris airport web site, yes, there are 25 ATMs and a branch in the whole of Terminal 2 operated by HSBC.

http://www.aeroportsdeparis.fr/en/passengers/services/money-mails-health/money-bank/bank-atm

Hard to believe HSBC is so well represented there when there is no longer even an ATM let alone a branch at Heathrow. There certainly used to be.

The bank itself is located across from the Sheraton Hotel in the center of CDG. But as others have said, their ATMs are throughout the airport.
Here are a few locations within Paris:

42 Blvd. Sebastopol
-- Corner of Blvd. Sebastopol & Rue Rambuteau

107 Bd. Saint Germain
-- South on Blvd. Saint Michel, head West

28 Rue di Rivoli
-- 6 blocks East of Hotel de Ville

Ave Champs-Elysees
-- Street corner behind Louis Vuitton

I was just at CDG late in 2015 and saw no HSBC ATM machines but I only walked through 2 of the Terminal 2 terminals looking for one. They are there, I have been told, but they are not the ones that you will first see. Those are Travelex ATM machines.

I remember another poster saying Travelex has been contracting out with European Airports to be their primary ATM service.