Vulnerability Intelligence Report
Win32k Elevation of Privilege Vulnerability
CVE-2021-40450
Win32k Elevation of Privilege Vulnerability
CISA KEV
SSVC: Active Exploitation
CVSS Base Score
7.8
HIGH
Exploitability:1.9
Impact Score:5.9
EPSS Probability:1.97%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
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Weaponization
—
SSVC Action
—
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Microsoft | Windows 10 Version 1809 | 10.0.0 < 10.0.17763.2237 (affected) |
| Microsoft | Windows Server 2019 | 10.0.0 < 10.0.17763.2237 (affected) |
| Microsoft | Windows Server 2019 (Server Core installation) | 10.0.0 < 10.0.17763.2237 (affected) |
| Microsoft | Windows 10 Version 1909 | 10.0.0 < 10.0.18363.1854 (affected) |
| Microsoft | Windows 10 Version 21H1 | 10.0.0 < 10.0.19043.1288 (affected) |
| Microsoft | Windows Server 2022 | 10.0.0 < 10.0.20348.288 (affected) |
| Microsoft | Windows 10 Version 2004 | 10.0.0 < 10.0.19041.1288 (affected) |
| Microsoft | Windows Server version 2004 | 10.0.0 < 10.0.19041.1288 (affected) |
| Microsoft | Windows 10 Version 20H2 | 10.0.0 < 10.0.19042.1288 (affected) |
| Microsoft | Windows Server version 20H2 | 10.0.0 < 10.0.19042.1288 (affected) |
| Microsoft | Windows 11 version 21H2 | 10.0.0 < 10.0.22000.258 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Microsoft Corporation · Vendor · USA |
| Reserved | 2021-09-02T00:00:00 |
| Published | 2021-10-13T00:26:49 |
| Patch Date | 2021-10-12 |
| Last Updated | 2025-10-21T23:25:28 |
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