Windows Kernel-Mode Drivers
CVE-2021-31952 — Windows Kernel-Mode Driver Elevation of Privilege Vulnerability
Executive Summary
None
Overview
7.8
CVSS HIGH
Important
MS Severity
Not Exploited
MS Exploit Status
More Likely
MS Exploit Likelihood
CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:CATTACK VECTOR
Local
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
Low
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
High
INTEGRITY
High
AVAILABILITY
High
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 6.8
EPSS Score
0.00812
probability of exploitation in the next 30 days
0.53841 percentile - updated 2026-08-14
View on FIRST.orgAffected Products
18 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Windows 10 Version 1809 for 32-bit Systems | 5003646 (Security Update) | Important | Elevation of Privilege | Yes |
| Windows 10 Version 1809 for ARM64-based Systems | 5003646 (Security Update) | Important | Elevation of Privilege | Yes |
| Windows 10 Version 1809 for x64-based Systems | 5003646 (Security Update) | Important | Elevation of Privilege | Yes |
| Windows 10 Version 1909 for 32-bit Systems | 5003635 (Security Update) | Important | Elevation of Privilege | Yes |
| Windows 10 Version 1909 for ARM64-based Systems | 5003635 (Security Update) | Important | Elevation of Privilege | Yes |
| Windows 10 Version 1909 for x64-based Systems | 5003635 (Security Update) | Important | Elevation of Privilege | Yes |
| Windows 10 Version 2004 for 32-bit Systems | 5003637 (Security Update) | Important | Elevation of Privilege | Yes |
| Windows 10 Version 2004 for ARM64-based Systems | 5003637 (Security Update) | Important | Elevation of Privilege | Yes |
| Windows 10 Version 2004 for x64-based Systems | 5003637 (Security Update) | Important | Elevation of Privilege | Yes |
| Windows 10 Version 20H2 for 32-bit Systems | 5003637 (Security Update) | Important | Elevation of Privilege | Yes |
| Windows 10 Version 20H2 for ARM64-based Systems | 5003637 (Security Update) | Important | Elevation of Privilege | Yes |
| Windows 10 Version 21H1 for 32-bit Systems | 5003637 (Security Update) | Important | Elevation of Privilege | Yes |
| Windows 10 Version 21H1 for ARM64-based Systems | 5003637 (Security Update) | Important | Elevation of Privilege | Yes |
| Windows 10 Version 21H1 for x64-based Systems | 5003637 (Security Update) | Important | Elevation of Privilege | Yes |
| Windows Server 2019 | 5003646 (Security Update) | Important | Elevation of Privilege | Yes |
| Windows Server 2019 (Server Core installation) | 5003646 (Security Update) | Important | Elevation of Privilege | Yes |
| Windows Server, version 2004 (Server Core installation) | 5003637 (Security Update) | Important | Elevation of Privilege | Yes |
| Windows Server, version 20H2 (Server Core Installation) | 5003637 (Security Update) | Important | Elevation of Privilege | Yes |
Patches
3 patches
| Article | Type | Restart |
|---|---|---|
5003646 | Security Update | Yes |
5003635 | Security Update | Yes |
5003637 | Security Update | Yes |
Known Exploits
No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.
Acknowledgments
Microsoft Security Assurance & Vulnerability Research
References
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