Microsoft has confirmed that the September 2026 KB5002914 security update can silently break copy and paste, autofill, and formula dragging in Microsoft Excel for some users. Affected versions include Excel 2024, 2021, 2019, and 2016, and Microsoft is investigating while users report that uninstalling KB5002914 restores normal behavior. #KB5002914 #MicrosoftExcel
Keypoints
- KB5002914 can cause Excel copy-and-paste actions to fail silently.
- The issue also affects autofill and formula dragging in Excel.
- Microsoft has confirmed the bug in Excel 2024, 2021, 2019, and 2016.
- Users receive no error message or beep when the failure occurs.
- Uninstalling KB5002914 has restored functionality for some impacted systems.