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

RHSA-2005:512-01 Moderate: mc security update

Files available:
gmc-4.5.51-36.8.i386.rpm
mc-4.5.51-36.8.i386.rpm
mcserv-4.5.51-36.8.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