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CVE PROGRAM SOURCE RECORD6.7 Medium

CVE-2026-21530

Windows Rich Text Edit Elevation of Privilege Vulnerability

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Status
Published
Published
Updated
Assigning organization
microsoft

Description

Double free in Windows Rich Text Edit allows an authorized attacker to elevate privileges 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 Office 2016

  • 16.0.0 to < 16.0.5556.1000affected

Microsoft Microsoft Office 2019

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

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 Windows 10 Version 1607

  • 10.0.14393.0 to < 10.0.14393.9140affected

Microsoft Windows 10 Version 1809

  • 10.0.17763.0 to < 10.0.17763.8755affected

Microsoft Windows 10 Version 21H2

  • 10.0.19044.0 to < 10.0.19044.7291affected

Microsoft Windows 10 Version 22H2

  • 10.0.19045.0 to < 10.0.19045.7417affected

Microsoft Windows 11 version 23H2

  • 10.0.22631.0 to < 10.0.22631.7079affected

Microsoft Windows 11 Version 23H2

  • 10.0.22631.0 to < 10.0.22631.7219affected

Microsoft Windows 11 Version 24H2

  • 10.0.26100.0 to < 10.0.26100.8457affected

Microsoft Windows 11 Version 25H2

  • 10.0.26200.0 to < 10.0.26200.8457affected

Microsoft Windows 11 version 26H1

  • 10.0.28000.0 to < 10.0.28000.2113affected

Microsoft Windows Server 2012

  • 6.2.9200.0 to < 6.2.9200.26079affected

Microsoft Windows Server 2012 (Server Core installation)

  • 6.2.9200.0 to < 6.2.9200.26079affected

Microsoft Windows Server 2012 R2

  • 6.3.9600.0 to < 6.3.9600.23181affected

Microsoft Windows Server 2012 R2 (Server Core installation)

  • 6.3.9600.0 to < 6.3.9600.23181affected

Microsoft Windows Server 2016

  • 10.0.14393.0 to < 10.0.14393.9140affected

Microsoft Windows Server 2016 (Server Core installation)

  • 10.0.14393.0 to < 10.0.14393.9140affected

Microsoft Windows Server 2019

  • 10.0.17763.0 to < 10.0.17763.8755affected

Microsoft Windows Server 2019 (Server Core installation)

  • 10.0.17763.0 to < 10.0.17763.8755affected

Microsoft Windows Server 2022

  • 10.0.20348.0 to < 10.0.20348.5139affected

Microsoft Windows Server 2022, 23H2 Edition (Server Core installation)

  • 10.0.25398.0 to < 10.0.25398.2330affected

Microsoft Windows Server 2025

  • 10.0.26100.0 to < 10.0.26100.32860affected

Microsoft Windows Server 2025 (Server Core installation)

  • 10.0.26100.0 to < 10.0.26100.32860affected

References