Skip to main content

This Site will be down for up to 3 hours on December 2, 2023 from 8 PM - 11 PM PST, to deploy an infrastructure update.

NetApp Knowledge Base

How does KB5008380 Microsoft CVE-2021-42287 Authentication Updates in Enforcement mode impact ONTAP 9 CIFS Operations

Last Updated:

Applies to

  • ONTAP 9 (running on-prem or in the cloud/virtual environment)
  • Windows Server 2008 to 2022 Domain Controllers
  • CIFS
  • Authentication


  • ONTAP 9 operations requiring domain credentials, such as 'vserver cifs create'.
  • It fails due to the PacRequestorEnforcement registry value is set to 2 after upgrading Windows Server to the November security update (CVE-2021-42287).
  • Microsoft for Authentication Updates:



Sign in to view the entire content of this KB article.

New to NetApp?

Learn more about our award-winning Support

NetApp provides no representations or warranties regarding the accuracy or reliability or serviceability of any information or recommendations provided in this publication or with respect to any results that may be obtained by the use of the information or observance of any recommendations provided herein. The information in this document is distributed AS IS and the use of this information or the implementation of any recommendations or techniques herein is a customer's responsibility and depends on the customer's ability to evaluate and integrate them into the customer's operational environment. This document and the information contained herein may be used solely in connection with the NetApp products discussed in this document.
Scan to view the article on your device