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

Microsoft has fixed a known issue that causes copy-and-paste failures for Excel users after installing the September 2026 security updates.

Microsoft has fixed Excel copy-and-paste failures caused by September 2026 updates across Office 2016, 2019, 2021, and 2024.

Microsoft has confirmed that copy and paste may silently fail for some Excel users after installing the 2026 KB5002914 ...

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

Microsoft confirmed an issue in the latest Windows 11 update that breaks copy and paste in Excel.

While Windows users are disappointingly familiar with updates causing problems, the same cannot be said of people using ...

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 fixes Excel 2016 copy-and-paste failures caused by KB5002914, while other Excel versions still need workarounds.

September's Patch Tuesday broke copy and paste in Excel, and Microsoft's fix only applies to Excel 2016. If your sheets use ...