[German]As of May 9, various security updates have been released for Windows Server 2008 R2 (in its 4th ESU year) as well as for Windows Server 2012/R2 (the updates may still run on Windows 7 SP1). Here is an overview of these updates for Windows Server 2008 R2 and Windows Server 2012/R2.
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Preliminary remarks about the update installation
Note the installation order information for Windows Server that Microsoft provides in the KB articles. Windows 7 and 8.1 are out of support in January 2023, but Windows 7 systems can be provided with security updates via updates. See my notes on Windows 7 ESU and BypassESU v12 in the blog post Microsoft Security Update Summary (February 14, 2023).
For security-only updates, make sure that the cumulative update KB5026366 for Internet Explorer dated May 9, 2023 will be installed manually.
Updates for Windows Server 2012 R2
A rollup and a security-only update have been released for Windows Server 2012 /R2. The update history for Windows 8.1 and Windows Server 2012 R2 can be found on this Microsoft page.
KB5026415 (Monthly Rollup) for Windows Server 2012 R2
Update KB5026415 (Monthly Rollup for Windows 8.1 and Windows Server 2012 R2) contains improvements and fixes, and addresses various vulnerabilities that are not specified. This update is automatically downloaded and installed by Windows Update in Windows Server 2012 R2, but is also available from the Microsoft Update Catalog and via WSUS. If installing manually, the latest Servicing Stack Update (SSU KB5023790) must be installed beforehand – although this SSU cannot be uninstalled. The fixes as well as issues related to the update are mentioned in the support article.
I had first feedback about issues after installing these updates from German users at the blog post Microsoft Security Update Summary (9. Mai 2023).
KB5026409 (Security-only update) for Windows 8.1/Server 2012 R2
Update KB5026409 (Security Only Quality Update for Windows 8.1 and Windows Server 2012 R2) addresses the same issues as the rollup update above. The update is distributed via WSUS (but not via Windows Update) or is available from the Microsoft Update Catalog. If installing, install the latest Servicing Stack Update (SSU) KB5023790 beforehand. Known issues are listed in the support article.
Updates for Windows Server 2012
A rollup and security-only update have been released for Windows Server 2012 and Windows Embedded 8 Standard. The update history for Windows 8.1 and Windows Server 2012 R2 can be found on this Microsoft page.
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KB5026419 (Monthly Rollup) for Windows Server 2012
Update KB5026419 (Monthly Rollup for Windows Server 2012, Windows Embedded 8 Standard) contains improvements and fixes as well as security patches. This update is available from the Microsoft Update Catalog and via WSUS. If installing manually, install the latest Servicing Stack Update (SSU KB5023791) beforehand – although this SSU cannot be uninstalled. Issues related to the update are indicated in the KB article.
KB5026411 (Security-only update) for Windows Server 2012
Update KB5026411 (Security-only for Windows Server 2012, Windows Embedded 8 Standard) contains improvements and fixes, addresses the same issues as the rollup update above. The update is available from the Microsoft Update Catalog and via WSUS. If installing, the latest Servicing Stack Update (SSU KB5023791) must be installed beforehand – although this SSU cannot be uninstalled. This update has the same known issues as the updates listed above.
Updates for Windows Server 2008 R2 (and Windows 7)
For Windows Server 2008 R2 SP1 with ESU a rollup and a security-only update have been released (should be installable on 64-bit Windows 7 SP1 with tricks). However, these updates are now only available for systems with ESU license (1st,2nd, 3rd and 4th year complete). The update history for Windows 7 can be found on this Microsoft page.
The update installation requires either a valid ESU license for 2023, or ESU Bypass v12 (see the comments above). In addition, security updates for Windows Embedded POSReady 7 until 2024 are provided, which can be installed under Windows 7. Furthermore, ACROS Security offers micropatches to secure until 2025 (see 0patch secures Microsoft Edge for Windows 7/Server 2008/2012/R2 until Jan. 2025).
KB5026413 (Monthly Rollup) for Windows 7/Windows Server 2008 R2
Update KB5026413 (Monthly Quality Rollup for Windows 7 SP1 and Windows Server 2008 R2 SP1) contains (besides the security fixes from the previous month) improvements and bug fixes and addresses the same issues as the update for Windows Server 2012. This update is automatically downloaded and installed via Windows Update. However, the package is also available via Microsoft Update Catalog and is distributed via WSUS. Details about the requirements and known issues can be found in the KB article.
KB5026426 (Security Only) for Windows 7/Windows Server 2008 R2
Update KB5026426 (Security-only update) is available for Windows 7 SP1 and Windows Server 2008 R2 SP1 with ESU license. The update addresses the same issues as the updates for Windows Server 2012 R2. The update is available via WSUS or in the Microsoft Update Catalog. To install the update, you must meet the prerequisites listed in the KB article and in the Rollup Update above. The update has the known bugs described in the KB article. Make sure to install the latest Servicing Stack Update beforehand.
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Microsoft Security Update Summary (May 9, 2023)
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Windows 7/Server 2008 R2; Server 2012 R2: Updates (May 9, 2023)
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