Microsoft has officially acknowledged that the September 2026 KB5002914 security update is causing critical failures in Microsoft Excel's copy-paste and autofill features.
- The KB5002914 security update is breaking core Excel functions like copy-paste, autofill, and formula dragging.
- Affected versions include Microsoft Excel 2016, 2019, 2021, and 2024.
- Users can temporarily resolve the issue by uninstalling the specific security patch.
Microsoft has officially confirmed reports that the September 2026 KB5002914 security update is causing significant functional issues for many Excel users. Following a surge of complaints on Reddit and official Microsoft Q&A forums, the tech giant admitted that the update is breaking essential features such as copy-and-paste, autofill, and formula dragging.
The glitch is not limited to a single version; Microsoft confirmed that it impacts Microsoft Excel 2016, 2019, 2021, and 2024. In a technical update to its support documentation, Microsoft noted a particularly frustrating aspect of the bug: "Although users try to paste content, the source remains selected and the destination is unmodified." Crucially, the software provides no error messages or audible alerts, leaving users in the dark about why their actions are failing.
Why This Matters
BozokMedia analysis shows that such bugs in enterprise-grade software can lead to massive productivity losses. For financial analysts, data scientists, and administrative professionals, the inability to perform basic data manipulation tasks in Excel can halt entire workflows and lead to manual entry errors.
When security patches compromise basic usability, the balance between protection and productivity is dangerously disrupted.
The KB5002914 update was originally released as part of the September 2026 Patch Tuesday to address critical vulnerabilities, including remote code execution and information disclosure. This incident follows a pattern of recent software disruptions, including issues with Word and PowerPoint launching and Windows 365 download failures.
How to Fix the Issue
While Microsoft continues to research a permanent fix, users have found that uninstalling the KB5002914 update restores normal functionality. This can be done via the Command Prompt (Run as Administrator) using specific commands tailored to the Office version being used.
| Office Version | Recommended Action |
|---|---|
| Office 2016 | Use Oarpmany.exe removal command |
| Office 2019 | Roll back version via C2RClient.exe |
| Office 2021 & 2024 | Use specific update version command |
Frequently Asked Questions
Question 1: Is there an official fix available yet?
Answer: As of now, Microsoft is still researching the issue. A permanent patch is expected soon.
Question 2: Will uninstalling the update leave my computer vulnerable?
Answer: Yes, removing the security update will revert your system to a previous state, potentially leaving it exposed to the vulnerabilities the patch was meant to fix.
