What is CVE-2021-40450?

CVE-2021-40450 is a security advisory published by Microsoft with High severity. EchelonGraph links Microsoft's advisory rather than copying its page; it is at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-40450.

Which CVE IDs does CVE-2021-40450 cover?

CVE-2021-40450 covers the following CVE IDs: CVE-2021-40450. Each CVE has its own detail page on EchelonGraph Pulse with its EchelonGraph score.

What is the CVSS v3 score of CVE-2021-40450?

CVE-2021-40450 has a CVSS v3 base score of 7.8, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2021-40450?

CVE-2021-40450 affects 22 products, including: Windows 10 Version 1809 for 32-bit Systems; Windows 10 Version 1809 for ARM64-based Systems; Windows 10 Version 1809 for x64-based Systems; Windows 10 Version 1909 for 32-bit Systems; Windows 10 Version 1909 for ARM64-based Systems; and others — see the full list on the advisory page.

How do I remediate CVE-2021-40450?

Microsoft lists 5 KB articles for CVE-2021-40450: KB5006672, KB5006667, KB5006670, KB5006699, KB5006674. Each is listed on this page with its fixed build; Microsoft's advisory is at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-40450.

CVE-2021-40450HighMicrosoft CVSS 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Microsoft security update for CVE-2021-40450 — Windows

Vendor

Microsoft Security Response Center (MSRC)

Published

October 12, 2021

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2021-40450 →

📋 Microsoft's advisory

EchelonGraph does not copy Microsoft's advisory page: its FAQ and remediation text are not shown here. Read the advisory on https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-40450. This page also shows what EchelonGraph holds for CVE-2021-40450, with the description from its CVE record, which the CVE Numbering Authority that assigned the CVE wrote: for a CVE Microsoft assigned, often in the words of Microsoft's own advisory.

🎯 Affected products22

Windows 10 Version 1809 for 32-bit Systems
Windows 10 Version 1809 for ARM64-based Systems
Windows 10 Version 1809 for x64-based Systems
Windows 10 Version 1909 for 32-bit Systems
Windows 10 Version 1909 for ARM64-based Systems
Windows 10 Version 1909 for x64-based Systems
Windows 10 Version 2004 for 32-bit Systems
Windows 10 Version 2004 for ARM64-based Systems
Windows 10 Version 2004 for x64-based Systems
Windows 10 Version 20H2 for 32-bit Systems
Windows 10 Version 20H2 for ARM64-based Systems
Windows 10 Version 21H1 for 32-bit Systems
Windows 10 Version 21H1 for ARM64-based Systems
Windows 10 Version 21H1 for x64-based Systems
Windows 11 version 21H2 for ARM64-based Systems
Windows 11 version 21H2 for x64-based Systems
Windows Server 2019
Windows Server 2019 (Server Core installation)
Windows Server 2022
Windows Server 2022 (Server Core installation)
Windows Server, version 2004 (Server Core installation)
Windows Server, version 20H2 (Server Core Installation)

✅ Updates Microsoft lists: 5 KB articles

7 rows: one per KB article or update, update type and fixed build. Their details are on Microsoft's advisory.

KB article	Update	Fixed build
KB5006672	Security Update	10.0.17763.2237
KB5006667	Security Update	10.0.18363.1854
KB5006670	Security Update	10.0.19043.1288
KB5006699	Security Update	10.0.20348.288
KB5006670	Security Update	10.0.19041.1288
KB5006670	Security Update	10.0.19042.1288
KB5006674	Security Update	10.0.22000.258

🧭 EchelonGraph on CVE-2021-40450

EchelonGraph score: 9.0 CRITICAL
CISA KEV: Listed since April 25, 2022
Fix status: A fix is available — apply it.

Description from the CVE record (CVE.org), as published by its numbering authority

Win32k Elevation of Privilege Vulnerability

Published by Microsoft Corporation, the CVE Numbering Authority that assigned CVE-2021-40450, in its CVE record at CVE.org; reused under the CVE Program's Terms of Use (its licence and MITRE's copyright notice are in our Terms of Service).

🔗 CVE IDs covered (1)

📋 Microsoft's advisory

🎯 Affected products22

✅ Updates Microsoft lists: 5 KB articles

🧭 EchelonGraph on CVE-2021-40450

🔗 References (8)