In early 2018, vulnerabilities were found that affect almost all Intel based processors.

https://meltdownattack.com/

Are MTP and VMTP machines affected by the Meltdown and Spectre vulnerabilities?

CentOS 5.X, 6.X, 7.X

In order to properly protect yourself on the VMTP and MTP, you will need to upgrade the software to 10.6+. During the installation of any version after 10.6, a yum update will be run on your CentOS machine. This will provide you with the latest patching available for CentOS/RHEL

Information about upgrading can be found on docops.ca.com