CVE-2026-21530

MEDIUM

Microsoft Windows 10 Version 1607 - Windows Rich Text Edit Elevation of Privilege Vulnerability

Title source: rule
STIX 2.1

Description

Double free in Windows Rich Text Edit allows an authorized attacker to elevate privileges locally.

References (1)

Core 1
Core References
Vendor Advisory vendor-advisory patch
Windows Rich Text Edit Elevation of Privilege Vulnerability
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21530

Scores

CVSS v3 6.7
EPSS 0.0032
EPSS Percentile 23.9%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-415
Status published
Products (40)
Microsoft/Microsoft 365 Apps for Enterprise 16.0.1 - https://aka.ms/OfficeSecurityReleases
Microsoft/Microsoft Office 2016 16.0.0 - 16.0.5556.1000
Microsoft/Microsoft Office 2019 19.0.0 - https://aka.ms/OfficeSecurityReleases
Microsoft/Microsoft Office LTSC 2021 16.0.1 - https://aka.ms/OfficeSecurityReleases
Microsoft/Microsoft Office LTSC 2024 16.0.0 - https://aka.ms/OfficeSecurityReleases
Microsoft/Windows 10 Version 1607 10.0.14393.0 - 10.0.14393.9140
Microsoft/Windows 10 Version 1809 10.0.17763.0 - 10.0.17763.8755
Microsoft/Windows 10 Version 21H2 10.0.19044.0 - 10.0.19044.7291
Microsoft/Windows 10 Version 22H2 10.0.19045.0 - 10.0.19045.7291
Microsoft/Windows 10 Version 22H2 10.0.19045.0 - 10.0.19045.7417
... and 30 more
Published May 12, 2026
Tracked Since May 12, 2026