KB4599208

• Updates to improve security when using Microsoft Office products.

• Updates to improve security when Windows performs basic operations.

• Updates to improve security when using external devices, such as game controllers, printers, and web cameras.

• Addresses a security vulnerability issue with HTTPS-based intranet servers. After installing this update, HTTPS-based intranet servers cannot, by default, use a user proxy to detect updates. Scans using these servers will fail if you have not configured a system proxy on the clients. If you must use a user proxy, you must configure the behavior using the policy “Allow user proxy to be used as a fallback if detection using system proxy fails.” To ensure the highest levels of security, also use Windows Server Update Services (WSUS) Transport Layer Security (TLS) certificate pinning on all devices. This change does not affect customers who are using HTTP WSUS servers. For more information, see Changes to scans, improved security for Windows devices.

• Addresses a security bypass vulnerability that exists in the way the Printer Remote Procedure Call (RPC) binding handles authentication for the remote Winspool interface. For more information, see KB4599464.

• Security updates to Windows App Platform and Frameworks, the Microsoft Graphics Component, Windows Media, Windows Fundamentals, the Windows Kernel, Windows Cryptography, Windows Virtualization, Windows Core Networking, Windows Peripherals, Windows Hybrid Storage Services, and the Windows Remote Desktop.

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