The September security release consists of 61 CVEs, of which 17 are listed as Critical 43 are rated Important, and 1 is rated as Moderate in severity. Four are listed as publicly known at the time of release and one of is reported as being actively exploited. See Dustin Childs excellent review and recommendations in Zero Day Initiative — The September 2018 Security Update Review where he provides additional information on the CVC reported as actively exploited and more.
The release consists of security updates for the following: Internet Explorer, Microsoft Edge, Microsoft Windows, Microsoft Office and Microsoft Office Services and Web Apps, ChakraCore, Adobe Flash Player, .NET Framework, Microsoft.Data.OData, and ASP.NET
The updates address Remote Code Execution, Elevation of Privilege, Security Feature Bypass, and Spoofing.
Release Notes
The release consists of security updates for the following: Internet Explorer, Microsoft Edge, Microsoft Windows, Microsoft Office and Microsoft Office Services and Web Apps, ChakraCore, Adobe Flash Player, .NET Framework, Microsoft.Data.OData, and ASP.NET
The updates address Remote Code Execution, Elevation of Privilege, Security Feature Bypass, and Spoofing.
Release Notes