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CVE PROGRAM SOURCE RECORD7.1 High

CVE-2026-55122

Microsoft Excel Information Disclosure Vulnerability

Description

Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.

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 < 16.0.5561.1001affected

Microsoft Microsoft Office 2019

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

Microsoft Microsoft Office 365 for Mac

  • 1.0.0 to < 16.111.26071215affected

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 < 16.111.26071215affected

Microsoft Microsoft Office LTSC for Mac 2024

  • 16.0.0 to < 16.111.26071215affected

Microsoft Office Online Server

  • 16.0.0.0 to < 16.0.10417.20175affected

References