How should I state my masters degree in my CV if I finished the program, but the ceremony won't be held for several months?
Find out from the university when the degree is conferred. This may be before or after the ceremony (it could be already conferred). (Also see: What date should I use for graduation?)


If the degree has already been conferred, you can write that you have a masters degree (the ceremony is irrelevant). 
If it hasn't, write that you have completed the degree requirements, and expect the degree to be conferred on X date.