Windows 10 version 1809 has a security update, but you have to install it manually

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What you need to know

  • Windows 10 version 1809 has a new security update.
  • To receive the update, you have to install it manually.
  • Windows 10 version 1809 reached its end of support earlier this month.

Windows 10 version 1809 may have reached its end of support earlier this month, but Microsoft has another update for it. The update brings Windows 10 to build 177.63.1579.

The update has just a single highlight, which is outlined on a Microsoft support page (opens in new tab):

  • Updates an issue that might cause Kerberos authentication and ticket renewal issues that are related to the implementation of CVE-2020-17049.

The update also includes a few improvements and fixes:

  • Addresses issues with Kerberos authentication related to the PerformTicketSignature registry subkey value in CVE-2020-17049, which was a part of the November 10, 2020 Windows update. The following issues might occur on writable and read-only domain controllers (DC):
  • Kerberos service tickets and ticket-granting tickets (TGT) might not renew for non-Windows Kerberos clients when PerformTicketSignature is set to 1 (the default).
  • Service for User (S4U) scenarios, such as scheduled tasks, clustering, and services for line-of-business applications, might fail for all clients when PerformTicketSignature is set to 0.
  • S4UProxy delegation fails during ticket referral in cross-domain scenarios if DCs in intermediate domains are inconsistently updated and PerformTicketSignature is set to 1.

As pointed out by Neowin, this build is not available through Windows Update. Instead, you have to manually install it through Microsoft Update Catalog (opens in new tab).

Sean Endicott
News Writer and apps editor

Sean Endicott brings nearly a decade of experience covering Microsoft and Windows news to Windows Central. He joined our team in 2017 as an app reviewer and now heads up our day-to-day news coverage. If you have a news tip or an app to review, hit him up at sean.endicott@futurenet.com (opens in new tab).

1 Comment
  • the Windows 10 v1809 release is not entirely out of support this November 2020 as only the HOME and PROFESSIONAL editions of 1809 were EOLed but the Education, Enterprise & LTSC 2019 editions of 1809 will continue to receive new updates. plus the KB4594442 update was quickly superseded by the KB4586839 "preview" update for v1809 in which THAT update was released two days later after the KB4594442 update was posted and KB4586839 is available not only thru MS Update Catalog but also thru Windows Update and WSUS. and yes both KB4594442 and KB4586839 updates CAN be installed onto the Home & Pro editions of 1809 as I've tested these updates myself on an old PC running 1809 Pro.