About this release This document contains important information about the current release. We recommend that you read the whole document. Release build — 5.9.1 Purpose This release adds enhancements and fixes problems that were reported in the previous version. Rating — Mandatory Mandatory Critical High Priority Recommended Required for all environments. Failure to apply Mandatory updates might result in a security breach. Mandatory patches and hotfixes resolve vulnerabilities that might affect product functionality and compromise security. You must apply these updates to maintain a viable and supported product. For more information, see KB51560. Upgrade paths At the time of the current release, you can upgrade these versions to McAfee® ePolicy Orchestrator® (McAfee® ePO™) 5.9.1: McAfee ePO 5.1.3 McAfee ePO 5.3.1 McAfee ePO 5.3.2 McAfee ePO 5.3.3 McAfee ePO 5.9.0 For information about supported upgrade paths for McAfee ePO, see KB86693. Updated components The current release upgrades these components. Apache Http Server 2.4.28 Apache Tomcat 7.0.82 Java Runtime 1.8.0_152 OpenSSL 1.0.2l Supported platforms The current release is compatible with these platforms. Operating System and Agent Handler Support Windows 2008 R2 Windows Server 2012 Windows Server 2012 R2 Windows Server 2016 Database Microsoft SQL Server and SQL Express Edition 2008 SP1 Microsoft SQL Server and SQL Express Edition 2008 R2 Microsoft SQL Server and SQL Express Edition 2012 Microsoft SQL Server and SQL Express Edition 2014 Microsoft SQL Server and SQL Express Edition 2016 Browser Support Internet Explorer 8.0 or later (including full support for compatibility mode) Firefox 24.0 or later Chrome 30.0 or later Safari 7.0 or later Microsoft Edge (Spartan browser) Note: This version of McAfee ePO requires enabling TLS 1.1 or 1.2 support on your browser. For information about supported platforms, environments, and operating systems for McAfee ePO, see KB51569.