Hi Solo,
Go to
https://fileconnect.symantec.com
put the serial number and download the version
this update is only for manager so no need to update your clients
you need to downoad SEPM only which i believe is SEPM-12.1.4a
SYM14-004 Symantec Endpoint Protection Management Vulnerabilities
http://www.symantec.com/business/support/index?page=content&id=TECH214866
Q: Am I required to update to the Symantec Endpoint Protection client?
A: No. Only the Symantec Endpoint Protection Manager requires an update. There are no client-side changes