Does this allay your concern, OP?
Cisco's Datasheet for the WRVS4400N indicating it follows the 802.11i standard, which includes
mandatory use of CCMP.
...and according to the WiFi Alliance's certification data on the WRVS4400N, last certification date 2008-06-20
CLASSIFICATION
PROGRAM
ConnectivityWi-Fi CERTIFIED b
Wi-Fi CERTIFIED g
WPA - Enterprise
WPA - Personal
WPA2 - Enterprise
WPA2 - Personal
Wi-Fi CERTIFIED n
OptimizationWMM
Not sure what else you want here.
My 00000010bits
Regards