[German]Another addendum from November 2024: On November 19, 2024, Microsoft fixed a problem caused by the security update KB5002653 from November 12, 2024 in Microsoft Excel 2016 (MSI version). Add-ins could no longer be loaded there.
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The Excel 2016 add-in loading problem
On November 12, 2024, Microsoft released the security update KB5002653 for Microsoft Excel 2016 (MSI version) to close various vulnerabilities (see Patchday: Microsoft Office Updates (November 12, 2024)).
This security update is intended to close the Remote Code Execution vulnerabilities CVE-2024-49026 (Improper Neutralization of Special Elements used in a Command ('Command Injection')), CVE-2024-49027 (Use After Free, CVSS 3.1 Score 7.8), CVE-2024-49028 (Out-of-bounds Read), CVE-2024-49029 (Use of Uninitialized Resource) and CVE-2024-49030 (Heap-based Buffer Overflow). All of the RCE vulnerabilities were rated as important with a CVSS 3.1 score of 7.8.
However, this security update caused a huge problem. A blog reader contacted us by email on November 13, 2024 and noted that after installing the KB5002653 update, no add-ins were loaded when Excel was started. Since the installation of the Office updates for Office 2016, Excel has been trying to load add-ins when entering the path, for example:
"C:\Users\username\AppData\Roaming\Microsoft\AddIns\"
to load the file LASSIST.XLA, although it was actually named "VLASSIST.XLA". Excel truncated the first letter of the path to the add-in so that the file could no longer be found.
Microsoft subsequently acknowledged the error and promised a remedy. I described the problem in more detail in the blog post Excel 2016 can no longer load add-ins after Nov. 2024 update KB5002653. Various workarounds are also described there to be able to load add-ins after all.
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Update KB4484305 fixes add-in loading error
Microsoft has released the update KB4484305 for Microsoft Excel 2016 (MSI installer) on November 19, 2024. According to the release note, the update fixes the problem that activated Excel add-ins could not be loaded correctly when opening Excel after installing the November 2024 security update. This update passed me by – a reader posted the information in a comment (thanks for that).
The update KB4484305 is only available for Microsoft Excel 2016 in the MSI installer version. The download links for 32- and 64-bit Excel versions can be found in the support article.
Similar articles:
Patchday: Microsoft Office Updates (November 12, 2024)
Excel 2016 can no longer load add-ins after Nov. 2024 update KB5002653
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