from SANS Internet Storm Center, InfoCON: green
Google's "Project Zero" released details about a number of critical vulnerabilities in Symantec's Endpoint Protection prodoct [1]. The vulnerabilities allow for arbitrary code execution on systems with this product installed. Other Symantec products are affected as well , since the vulnerabilities affect the core scanning engine in Symantec Endpoint Protection.
Symantec has released updates, and given the details released by Google you should update as soon as possible. You will need to update the actual Symantec product, which is different from performing a signature update (the signature update happens automatically)
[1] http://ift.tt/294X7ca