B99010 is a "container" hot fix that contains "member" hot fixes which will update your SAS software components.
See "What is a container hot fix?" in the SAS Hot Fix FAQ for more information on container and member hot fixes.
A manifest listing the contents of each of the following "member" hot fixes is available:
B25162 manifest for Base SAS 9.21_M3
B99009 manifest for SAS/CONNECT 9.21_M2