Warning: Vulnerabilities in Microsoft Windows Security Update for November

11th November 2022

Together with their monthly security updates for Windows, Microsoft has also rolled out the first patches for the vulnerabilities CVE-2022-38023 (Netlogon) as well as CVE-2022-37967 and CVE-2022-37966 (Windows Kerberos) for many client and server operating systems, on November 8th.

Initial internal tests carried out by VIVAVIS, however, revealed that these patches cause massive system disruptions and even a total breakdown of systems. We therefore issue a warning against the following patches and urgently recommend suspending the roll-out of these patches immediately:

KB5020805: How to manage Kerberos protocol changes related to CVE-2022-37967

KB5021130: How to manage the Netlogon protocol changes related to CVE-2022-38023

KB5021131: How to manage the Kerberos protocol changes related to CVE-2022-37966

Further information about the patches and first problem reports can be found here.

If you have further questions on this matter or if you require support, please contact our Customer Support.


Peter Schwark


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