firmware update for Netgear CM500

I just replaced my Arris SB6190 with a netgear CM500 because it does not have the firmware issue that affects the Arris. The firmware in the CM500 is 1.01.14 based on my review via the admin console of the modem. Currently, the latest Comcast firmware version for this modem is 1.01.15.  How would I go about getting the vastest firmware version pushed to me. I have read I cannot do it myself so I am asking how and when Comcast might do it for me. 

Thanks

Bob