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CVE PROGRAM SOURCE RECORD8.8 High

CVE-2026-65807

Microsoft Excel Remote Code Execution Vulnerability

Description

Access of resource using incompatible type ('type confusion') in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Microsoft Microsoft 365 Apps for Enterprise

  • 16.0.1 to < https://aka.ms/OfficeSecurityReleasesaffected

Microsoft Microsoft Excel 2016

  • 16.0.0.0 to < 16.0.5565.1001affected

Microsoft Microsoft Office 2019

  • 19.0.0 to < https://aka.ms/OfficeSecurityReleasesaffected

Microsoft Microsoft Office 365 for Mac

  • 1.0.0 to < 16.112.26081010affected

Microsoft Microsoft Office LTSC 2021

  • 16.0.1 to < https://aka.ms/OfficeSecurityReleasesaffected

Microsoft Microsoft Office LTSC 2024

  • 16.0.0 to < https://aka.ms/OfficeSecurityReleasesaffected

Microsoft Microsoft Office LTSC for Mac 2021

  • 16.0.1 to < 16.112.26081010affected

Microsoft Microsoft Office LTSC for Mac 2024

  • 16.0.0 to < 16.112.26081010affected

Microsoft Office Online Server

  • 16.0.0.0 to < 16.0.10417.20175affected

References