Symantec Endpoint Security v12.1.4112.4156 was installed in the NSS Labs live stack test harness as part of NSS’ continuous live testing of enterprise endpoint protection (EPP) products. Symantec’s product was subjected to thorough testing for protection against socially engineered malware (SEM) at the NSS facility in Austin, Texas, based on the Security Stack: Test Methodology v1.5. NSS test methodologies are available at nsslabstage.wpengine.com.