Microsoft fixes broken Excel copy and paste for all Office users
Microsoft fixed Excel copy-and-paste failures caused by September 2026 Office security updates.
Microsoft fixed a known issue in which September 2026 security updates, including KB5002914, broke copy-and-paste, autofill, and formula dragging in Excel. Excel 2016, 2019, 2021, and 2024, plus Excel Online in Office Online Server, could leave the destination unchanged with no error message. Affected users must manually install KB5002665 for Excel 2016 and specified builds for Office LTSC 2019, 2021, and 2024. Microsoft warned that paste may still fail when a workbook uses conditional formatting and suggested Paste Special as a temporary workaround.
- September 2026 updates, including KB5002914, broke Excel paste and autofill.
- Excel 2016 through 2024 and Excel Online could fail paste silently.
- Fixes are KB5002665 and specified Office LTSC builds, installed manually.
- Conditional formatting can still fail; Paste Special is a workaround.
- Vendors
- Microsoft
From the original article
2 min read at bleepingcomputer.com
Microsoft has fixed a known issue that causes copy-and-paste failures for Excel users after installing the September 2026 security updates. [...]
By Sergiu Gatlan · bleepingcomputer.com
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