Microsoft rolls out targeted fix for Excel 2016 paste failure after September security patch
Microsoft has released update KB5002655 to address a copy-and-paste malfunction in Excel 2016 caused by the September 2026 security update KB5002914. The bug, which also affected other Excel versions, silently prevented paste operations from completing. The fix currently applies only to MSI-based Office 2016 installations, while Microsoft suggests using Paste Special or uninstalling the security update as interim workarounds.
The September security update KB5002914 introduced a code regression that silently blocked paste operations across multiple Excel editions, including the online version and desktop releases from 2016 through 2024. Microsoft's confirmation noted users received no audible or visual warning when pasting failed, leaving the source selection intact while the destination remained unchanged.
The interim fix KB5002655 targets only traditional MSI-based Office 2016 installations, leaving Click-to-Run subscribers without a permanent solution. Microsoft recommends Paste Special as a temporary workaround, while some users have reverted the security patch entirely — a choice that removes protections against remote code execution and information disclosure flaws. The company has not announced a timeline for broader remediation.
The silent failure of copy-and-paste in Excel could disrupt productivity for professionals who rely heavily on spreadsheet workflows, including analysts, accountants, and administrative staff. Organizations may face delayed reporting or data-entry errors if users unknowingly proceed without successful pastes. While Microsoft's targeted fix helps only a subset of Office 2016 users, broader impact could persist until a universal solution arrives. Businesses may need to weigh the security risks of uninstalling the patch against operational continuity, potentially creating short-term vulnerability windows.