Severity Rating: Critical
Revision Note: V1.1 (May 25, 2016): Removed redundant rows from the Vulnerability Severity Rating and Maximum Security Impact by Affected Software table, and added the applicable update numbers for clarity. This is an informational change only.
Summary: This security update resolves a vulnerability in the VBScript scripting engine in Microsoft Windows. The vulnerability could allow remote code execution if a user visits a specially crafted website. An attacker who successfully exploited this vulnerability could gain the same user rights as the current user. If the current user is logged on with administrative user rights, an attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.