You don't say but what versions are you getting and what versions do you expect?
What repositories do I have?
You can find out what repositories your system is configured to query using this command:
$ yum repolist | expand
Loaded plugins: fastestmirror, priorities, refresh-packagekit
Loading mirror speeds from cached hostfile
* base: centos.mirror.constant.com
* epel: mirror.steadfast.net
* extras: mirror.symnds.com
* updates: bay.uchicago.edu
77 packages excluded due to repository priority protections
repo id repo name status
base CentOS-6 - Base 6,297+70
epel Extra Packages for Enterprise Linux 6 - x86_64 10,246
extras CentOS-6 - Extras 7+7
updates CentOS-6 - Updates 314
repolist: 16,864
Package info
You can query any package whether it's installed or not using yum info <pkg>.
$ yum info cmake
Loaded plugins: fastestmirror, priorities, refresh-packagekit
Loading mirror speeds from cached hostfile
* base: centos.mirror.constant.com
* epel: mirror.steadfast.net
* extras: mirror.symnds.com
* updates: bay.uchicago.edu
77 packages excluded due to repository priority protections
Installed Packages
Name : cmake
Arch : x86_64
Version : 2.6.4
Release : 5.el6
Size : 18 M
Repo : installed
From repo : base
Summary : Cross-platform make system
URL : http://www.cmake.org
License : BSD
Description : CMake is used to control the software compilation process using simple
: platform and compiler independent configuration files. CMake generates
: native makefiles and workspaces that can be used in the compiler
: environment of your choice. CMake is quite sophisticated: it is possible
: to support complex environments requiring system configuration, pre-processor
: generation, code generation, and template instantiation.
Package's URL
You can find out where a RPM is being downloaded from using the repoquery command.
$ repoquery --location cmake
http://centos.mirrors.hoobly.com/6.5/os/x86_64/Packages/cmake-2.6.4-5.el6.x86_64.rpm
Which is part of this repository:
$ repoquery -i cmake | grep Repos
Repository : base
So this is a base repository to the CentOS distro that's providing this package.
What other repositories have it?
You can query what repositories contain a specific package (at least most of the major repos) using pkgs.org.
According to this list the EPEL repo has the latest version pre-built. The version of this package is as follows: cmake 28-2.8.11.2-1.