Microsoft confirms KB5002914 Excel update breaks copy and paste

Recorded: Sept. 15, 2026, 2:46 p.m.

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HomeNewsMicrosoftMicrosoft confirms KB5002914 Excel update breaks copy and paste

Microsoft confirms KB5002914 Excel update breaks copy and paste

By Sergiu Gatlan

September 15, 2026
04:40 AM
2

Microsoft has confirmed that copy and paste may silently fail for some Excel users after installing the September 2026 KB5002914 security update.
This follows a wave of customer reports on Reddit and the Microsoft Q&A forums that the KB5002914 Office security update is breaking copy-and-paste, autofill, and formula dragging in Excel.
"Although users try to paste content, the source remains selected and the destination is unmodified," Microsoft said in an updated support document confirming these issues.
"When this issue occurs, users receive no indication of the failure, such as a beep or error message. Microsoft is researching the issue and will post more information in this article when the information becomes available."
In a separate service alert seen by BleepingComputer, Microsoft said the issues affect Microsoft Excel 2024, 2021, 2019, and 2016, and are caused by a code regression.
"A code regression contained within a recent service update is causing impact," it said. "Our development and validation of the individual fixes targeting each of the impacted versions is ongoing, and we'll provide an estimated timeline for resolution as one becomes available."
While Microsoft is still working to resolve this bug, affected Excel users have reported that uninstalling KB5002914 restores copy-and-paste functionality on impacted systems.
To do that, open a new Command Prompt window with the "Run as administrator" option and run one of the following commands (depending on your Office version):

Office 2016:
"C:\Program Files\Common Files\Microsoft Shared\OFFICE16\Oarpmany.exe" /removereleaseinpatch "{90160000-0012-0000-1000-0000000FF1CE}" "{27882596-A8ED-4382-9C71-6CD2DD19F732}" "1033" "0"

Office 2019:
"C:\Program Files\Common Files\Microsoft Shared\ClickToRun\OfficeC2RClient.exe" /update user updatetoversion=16.0.10417.20197

Office 2021 & 2024:
"C:\Program Files\Common Files\Microsoft Shared\ClickToRun\OfficeC2RClient.exe" /update user updatetoversion=16.0.20326.20132
Microsoft released the KB5002914 security update last week as part of its September 2026 Patch Tuesday to patch a long list of remote code execution and information disclosure vulnerabilities.
In July, Microsoft also fixed an issue that was preventing third-party applications from launching Word, Excel, PowerPoint, Access, and other Microsoft Office apps or opening documents on up-to-date Windows systems.
One month earlier, Microsoft addressed another bug that blocked Office for the web users from opening Excel and PowerPoint files, and another that blocked Windows 365 users from downloading and installing the Office suite.
On Monday, it also released emergency out-of-band updates to resolve Remote Desktop Services failures caused by the September 2026 security updates, along with Hyper-V and USB audio problems on some Windows versions.

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Related Articles:
Microsoft Excel KB5002914 update breaks copy and paste for some usersMicrosoft fixes known issue causing Windows Defender crashesMicrosoft releases emergency Windows updates to fix RDS failuresMicrosoft: September updates cause RDS failures on Windows ServerMicrosoft: September updates break audio on some Windows PCs

Copy and Paste
Excel
KB5002914
Known Issue
Microsoft
Microsoft Office
Security Update

Sergiu Gatlan
Sergiu is a news reporter who has covered the latest cybersecurity and technology developments for over a decade. Email or Twitter DMs for tips.

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Comments

SelfMan - 1 hour ago

FYI, the above command for Office 2021 and 2024 is for the Current Channel (retail), not LTSC.
For Office 2024 LTSC use:
"C:\Program Files\Common Files\microsoft shared\ClickToRun\officec2rclient.exe" /update user updatetoversion=16.0.17932.20910
FYI the Out of band release 16.0.17932.20996 is still buggy.
Copying sheets into existing or new does not work. Copying larger content including images to another sheet does not work either.

ZeroYourHero - 1 hour ago

More vibe coding at Microsoft.

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Microsoft has confirmed that the September 2026 security update, KB5002914, introduced a code regression that causes copy and paste functionality to fail silently for certain Excel users. This issue encompasses problems with copy-and-paste operations, autofill, and formula dragging within the application. When this regression occurs, users experience no visual indication of the failure, such as a beep or error message, as the source content remains selected and the destination is left unmodified despite the user attempting to paste. Microsoft stated that they are actively researching the issue and will provide further information as details become available.

The affected software includes Microsoft Excel versions 2024, 2021, 2019, and 2016. The problems stem specifically from a code regression contained within the recent service update. Microsoft is currently working on developing and validating individual fixes targeting each impacted version, with an estimated timeline for resolution pending.

Affected users have found a temporary solution by uninstalling KB5002914, which restores the copy-and-paste functionality on their systems. The provided text details specific command-line methods for undertaking this uninstallation, which vary depending on the specific Office version installed. For Office 2016, the command involves executing a specific executable to remove a lease in patch identifiers. For Office 2019, a command updates the user to a specific version identifier. For Office 2021 and 2024, the command similarly utilizes the ClickToRun client executable to update the user to a specified version. Note that subsequent reports indicate that copying sheets into existing or new sheets, or copying larger content including images to another sheet, also did not work after the update.

The KB5002914 security update was released as part of the September 2026 Patch Tuesday, which also included other unrelated fixes, such as remediation for remote code execution and information disclosure vulnerabilities, as well as emergency out-of-band updates addressing failures in Remote Desktop Services, Hyper-V, and USB audio on various Windows versions. This situation highlights the ongoing complexity of patch management, where security updates, even those intended to resolve vulnerabilities, can inadvertently introduce unintended functional regressions in critical applications.