On 8, Microsoft rolled out KB5002914 for Excel, but it apparently has a bug that makes it impossible to copy and paste.

The wait begins.

German]The Microsoft security updates released for Office applications on September 8, 2026, are causing serious collateral damage. In Excel, it is no longer possible to select and copy anything.

Microsoft has confirmed a copy-and-paste issue affecting Excel 2024, 2021, 2019, and 2016 after the KB5002914 security update ...

Microsoft's September security update stops Excel from pasting. The command fails without a beep and without an error message ...

Microsoft Excel users report that this week's KB5002914 Office security update is breaking copy-and-paste operations and ...

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