Microsoft has fixed a known issue in the September 2026 security updates that caused copy-and-paste, autofill, and formula dragging to fail silently in Excel for multiple versions, including Excel Online. Affected users must install the updated Office builds, while some Office 2016 and Office LTSC 2019 scenarios with conditional formatting may still need the Paste Special workaround. #Microsoft #Excel #KB5002914 #Office2016 #OfficeLTSC2019 #OfficeLTSC2021 #OfficeLTSC2024
Keypoints
- Microsoft fixed a known issue affecting Excel copy-and-paste after September 2026 updates.
- The bug also disrupted autofill and formula dragging in several Excel versions.
- Paste operations could fail silently with no error message or alert.
- Users must install specific Office updates to restore normal behavior.
- Excel files with conditional formatting may still need the Paste Special workaround in some cases.