The following errata for CentOS-2 have been built and uploaded the the centos mirror:

RHBA-2004:503-20 Updated sysstat package

Files available:
sysstat-5.0.5-14.21as.i386.rpm
sysstat-isag-5.0.5-14.21as.i386.rpm

More details are available from the RedHat web site at https://rhn.redhat.com/errata/rh21as-errata.html

The easy way to make sure you are up to date with all the latest patches is to run:
# yum update