CVE-2021-42286

HIGH

Windows 10 and Windows Server 2016 - Elevation of Privilege in Core Shell SI Host Extension Framework

Title source: llm

Windows Core Shell SI Host Extension Framework for Composable Shell Elevation of Privilege Vulnerability

Core 1

Core References

Patch, Vendor Advisory x_refsource_misc

CVSS v3 7.8

EPSS 0.0043

EPSS Percentile 34.6%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vulnrichment

Exploitation none

Automatable no

Technical Impact total

CWE

CWE-269

Status published

Products (5)

microsoft/windows_10 20h2 (3 CPE variants)

microsoft/windows_10 21h1 (3 CPE variants)

microsoft/windows_10 2004 (3 CPE variants)

microsoft/windows_server 20h2

microsoft/windows_server_2016 2004

Published Nov 10, 2021

Tracked Since Feb 18, 2026