Windows 10 · 2016 · Release · Out-of-band update

July 7, 2021—KB5004948 (OS Build 14393.4470) Out-of-band - EXPIRED

What's in this update

This security update includes key changes as follows: Updates a remote code execution exploit in the Windows Print Spooler service, known as “PrintNightmare”, as documented in CVE-2021-34527 .

From Microsoft's release notes for KB5004948.

Microsoft's known issues — KB5004948

  • Issue Known issue After installing updates released April 22, 2021 or later, an issue occurs that affects versions of Windows Server that are in use as a Key Management Services (KMS) host. Client devices running Windows 10 Enterprise LTSC 2019 and Windows 10 Enterprise LTSC 2016 might fail to activate. This issue only occurs when using a new Customer Support Volume License Key (CSVLK). Note This does not affect activation of any other version or edition of Windows.Client devices that are attempting to activate and are affected by this issue might receive the error, "Error: 0xC004F074. The Software Licensing Service reported that the computer could not be activated. No Key Management Service (KMS) could be co Workaround: This issue is resolved in KB5010359 .

Microsoft's release notes for KB5004948 ›

Known issues — reported on the forum

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In the news

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Discussed on the forum

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