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

RHSA-2008:0618-01 Moderate: vim security update

Files available:
vim-common-6.0-7.25.i386.rpm
vim-enhanced-6.0-7.25.i386.rpm
vim-minimal-6.0-7.25.i386.rpm
vim-X11-6.0-7.25.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