May 8, 2018—KB4103721 (OS Build 17134.48)

2018-05-0807:00:00

Microsoft

support.microsoft.com

8.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

7.3 High

AI Score

Confidence

High

9.3 High

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:N/AC:M/Au:N/C:C/I:C/A:C

0.975 High

EPSS

Percentile

100.0%

JSON

May 8, 2018—KB4103721 (OS Build 17134.48)

Improvements and fixes

This update includes quality improvements. No new operating system features are being introduced in this update. Key changes include:

Addresses an issue with the April 2018 Windows Servicing update that causes App-V Scripts (User Scripts) to stop working.
Addresses an issue that may cause some devices to stop responding or working when using applications, such as Cortana or Chrome, after installing the Windows 10 April 2018 Update.
Addresses an issue that prevents certain VPN apps from working on builds of Windows 10, version 1803. These apps were developed using an SDK version that precedes Windows 10, version 1803, and use the public RasSetEntryProperties API.
Addresses additional issues with updated time zone information.
Addresses an issue that may cause an error when connecting to a Remote Desktop server. For more information, see CredSSP updates for CVE-2018-0886.
Security updates to Windows Server, Microsoft Edge, Internet Explorer, Microsoft scripting engine, Windows app platform and frameworks, Windows kernel, Microsoft Graphics Component, Windows storage and filesystems, HTML help, and Windows Hyper-V.
If you installed earlier updates, only the new fixes in this package will be downloaded and installed on your device.For more information about the resolved security vulnerabilities, see the Security Update Guide.

Known issues in this update

Symptom	Workaround
Some users running Windows 10 version 1803 may receive an error “An invalid argument was supplied” when accessing files or running programs from a shared folder using the SMBv1 protocol.	This issue is resolved in KB4284848.
When attempting to upgrade to the Window 10 April 2018 Update, select devices with Intel SSD 600p Series or Intel SSD Pro 6000p Series may repeatedly enter a UEFI screen after restart or stop working.	This issue is resolved in KB4100403. Users will now be offered Window 10 version 1803.
After upgrading to the Window 10 April 2018 Update, select devices with Toshiba XG4 Series, Toshiba XG5 Series, or Toshiba BG3 Series SSDs may exhibit lower battery life.	This issue is resolved in KB4100403. Users will now be offered Window 10 version 1803.
After upgrading to Window 10 version 1803, some users cannot run QuickBooks (2017, 2018) in multi-user mode. Users may see the error code, “Error 193:0xc1 Windows could not start the QuickBooksDBXX service on Local Computer.”	This issue is resolved in KB4338548. Users will now be offered Window 10 version 1803.

How to get this update

This update will be downloaded and installed automatically from Windows Update. To get the standalone package for this update, go to the Microsoft Update Catalog website.File informationFor a list of the files that are provided in this update, download the file information for cumulative update 4103721.