IT Pro is supported by its audience. When you purchase through links on our site, we may earn an affiliate commission. Learn more

Microsoft issues out-of-band patch for Windows Server sign-in bug

The flaw, which causes a slow down in the user verification process, needs to be installed manually by IT admins

Microsoft logo suspended above a conference floor

Microsoft has issued an out-of-band patch for Windows Server to fix a problem that could potentially stop remote desktop users logging into the system.

The flaw causes performance issues with Windows Server, which would result either in a slow sign-in process, general slowness, or at worst a black screen, Microsoft said.

Windows Server 2019 is at risk, and Microsoft has published KB5010196 to address this edition. The bug also affects Windows Server 2012 Release 2, which the company has addressed with KB5010215.

Also affected are Window Server 2022 and 2016, which the company said it would address in the coming days.

The bug stemmed from the KB5008218 update that Microsoft released during a regular Patch Tuesday update on December 14. This update introduced some security changes for Windows.

The out-of-band updates will not install automatically as part of the Windows Update service, meaning that administrators must install them manually by importing it into the Windows Server Update Service (WSUS). They can get the Windows Server 2019 patch by visiting the Microsoft Update Catalog website. Windows Server 2012 Release 2 users can go here.

Related Resource

The care and feeding of cloud

How to support cloud infrastructure post-migration

How to support cloud infrastructure post-migration - webinar from Trend MicroWatch now

The latest updates are cumulative, and the Windows Server 2019 update inherits three other less urgent Windows issues identified by Microsoft. This includes errors for devices using Asian language packs, and a temporary problem starting the Windows Cluster Service that disappears when rebooting after approximately 20 minutes. There is also an issue with versions of Windows Server used as Key Management Services hosts that might prevent some client Windows 10 operating systems from activating. The company will fix these in future releases, it said.

Out-of-band patches for Windows Server are rare. Microsoft issued one in November last year, addressing a bug in Windows Server when used as a domain controller. The flaw prevented servers from authenticating legitimate users who tried to access resources using a single sign-on token.

Featured Resources

Four strategies for building a hybrid workplace that works

All indications are that the future of work is hybrid, if it's not here already

Free webinar

The digital marketer’s guide to contextual insights and trends

How to use contextual intelligence to uncover new insights and inform strategies

Free Download

Ransomware and Microsoft 365 for business

What you need to know about reducing ransomware risk

Free Download

Building a modern strategy for analytics and machine learning success

Turning into business value

Free Download

Recommended

Microsoft to double salary budget to retain workers
Careers & training

Microsoft to double salary budget to retain workers

17 May 2022
Microsoft warns of new botnet variant targeting Windows and Linux systems
Security

Microsoft warns of new botnet variant targeting Windows and Linux systems

16 May 2022
Windows Server admins say latest Patch Tuesday broke authentication policies
Server & storage

Windows Server admins say latest Patch Tuesday broke authentication policies

12 May 2022
Actively exploited Windows vulnerability reaches peak severity when paired with popular attack
Security

Actively exploited Windows vulnerability reaches peak severity when paired with popular attack

11 May 2022

Most Popular

Russian hackers declare war on 10 countries after failed Eurovision DDoS attack
hacking

Russian hackers declare war on 10 countries after failed Eurovision DDoS attack

16 May 2022
Windows Server admins say latest Patch Tuesday broke authentication policies
Server & storage

Windows Server admins say latest Patch Tuesday broke authentication policies

12 May 2022
IT admin deletes company’s databases and is jailed for seven years
Policy & legislation

IT admin deletes company’s databases and is jailed for seven years

16 May 2022