Severity Rating: Critical
Revision Note: V2.1 (April 7, 2016): Updated the footnotes following the Affected Software table to further clarify installation order for security update 3101746 in MS15-115, 3081320 in MS15-121, and 3101246 in MS15-122. This is an informational change only. Customers who have already successfully installed the update do not need to take any action.