KB5030279 Security Update for Windows Server 2012

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KB5030279 is the security-only update for Windows Server 2012. It was released as part of the ‘Patch Tuesday’ project on 12th September 2023.

Salient points

  • KB5030279 is a standalone security update for Windows Server 2012. For full security coverage, you will need to deploy all the previous security updates.
  • KB5030279 succeeds KB5029308 security update for Windows Server 2012. KB5029308 was released in August 2023.
  • KB5030278 is the monthly rollup update for Windows Server 2012. We strongly recommend installing the monthly rollup update instead of the security-only update because the monthly rollup updates are cumulative in nature.
  • A new Servicing Stack Update KB5030330 has been released for Windows Server 2012 on 12th September 2023.
  • Before installing KB5030279, you will need to deploy the latest Servicing Stack Update KB5030330 for Windows Server 2012.
  • A new cumulative update for Internet Explorer 11 KB5030209 has also been released on 12th September 2023.
  • You will need to install the KB5030209 cumulative update for Internet Explorer 11 before installing the KB5030279 security update.
  • The issue with language packs continues to impact Windows Server 2012. If you install a language pack after installing KB5030279, you will have to redeploy the security update KB5030279.
  • There are 12 security vulnerabilities that have been disclosed for Windows Server 2012 as part of the September security bulletin released by Microsoft.
  • None of the disclosed vulnerabilities have ‘CRITICAL’ severity levels.
  • There is no zero-day threat that affects Windows Server 2012.

Windows Server 2012 goes End of Support in October 2023. Extended Security Updates or ESUs can be renewed for a period of 3 years. This ensures the continuity of security updates until October 2026.

Download KB5030279

You can deploy KB5030279 through WSUS or Windows Server Update Service.

For manual deployments, you will need to download and install the offline installer file for KB5030279. Installing KB5030279 on Windows Server 2012 is a three-step process.

  1. Download and install KB5030330 Servicing Stack Update
  2. Download and install KB5030209 cumulative update for Internet Explorer 11
  3. Download and install KB5030279 security update for Windows Server 2012

You can download the offline installer files from the Microsoft Update Catalog website. Or, you could use the direct download links for the offline installer files shared below.

Download KB5030330 Servicing Stack Update

Upon installation of the Servicing Stack Update, the server does not reboot.

Download KB5030209 Cumulative Update for Internet Explorer 11

The server will reboot for the cumulative update to take effect for Internet Explorer 11.

Download KB5030279 Cumulative Update for Windows Server 2012

The security update KB5030279 will cause the server to reboot. Therefore, we strongly suggest using an organized change management process to carry out the deployment of KB5030279 on the server.


There have been 12 security vulnerability disclosures for Windows Server 2012 as part of the September 2023 security bulletin. Out of these 12 vulnerabilities, there are no CRITICAL vulnerabilities.

There are no zero-day threats that affect Windows Server 2012 as per September month’s security bulletin.

KB5030278 Changelog

The following changes are part of the KB5030278 monthly rollup update for Windows Server 2012:

  • The renaming of local temporary user policy files during Group Policy processing might cause registry settings under Policies related paths to be deleted.
  • This update includes changes to Israel daylight saving time (DST).

For more details about KB5030279, you could also refer to the release documents for KB5030279.

September 2023 Updates

You may also like to refer to the following updates released in September 2023 by Microsoft:

Rajesh Dhawan

Rajesh Dhawan is a technology professional who loves to blog about smart wearables, Cloud computing and Microsoft technologies. He loves to break complex problems into manageable chunks of meaningful information.