The Project Zero team at Google has found many security vulnerabilities in multiple Symantec and Norton security products. These vulnerabilities may not require any user interaction, such as running a file or opening an email. Symantec recommends applying the required updates to the products included in their advisory as soon as possible.

Symantec has included a list of the affected products in this response: https://www.symantec.com/security_response/securityupdates/detail.jsp?fid=security_advisory&pvid=security_advisory&year=&suid=20160628_00.