MS16-063 - Cumulative Security Update for Internet Explorer Severity Rating: CriticalRevision Note: V1.1 (June 22, 2016): Bulletin revised to add workarounds for CVE-2016-3213. This is an informational change only. Customers who have successfully installed the updates do not need to take any further action. Read more about MS16-063 - Cumulative Security Update for Internet Explorer