CVE-2026-20842— Microsoft DWM Core Library Elevation of Privilege Vulnerability
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I. Basic Information for CVE-2026-20842
Vulnerability Information
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Vulnerability Title
Microsoft DWM Core Library Elevation of Privilege Vulnerability
Source: NVD (National Vulnerability Database)
Vulnerability Description
Use after free in Windows DWM allows an authorized attacker to elevate privileges locally.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
释放后使用
Source: NVD (National Vulnerability Database)
Vulnerability Title
Microsoft DWM Core Library 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft DWM Core Library是美国微软（Microsoft）公司的微软windows得一个核心库。 Microsoft DWM Core Library存在资源管理错误漏洞。攻击者利用该漏洞可以提升权限。以下产品和版本受到影响：Windows Server 2022,Windows Server 2022 (Server Core installation),Windows 10 Version 21H2 for 32-bit Systems,Windows 10 Version
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Microsoft | Windows 10 Version 21H2 | 10.0.19044.0 ~ 10.0.19044.6809 | - | |
| Microsoft | Windows 10 Version 22H2 | 10.0.19045.0 ~ 10.0.19045.6809 | - | |
| Microsoft | Windows 11 version 22H3 | 10.0.22631.0 ~ 10.0.22631.6491 | - | |
| Microsoft | Windows 11 Version 23H2 | 10.0.22631.0 ~ 10.0.22631.6491 | - | |
| Microsoft | Windows 11 Version 24H2 | 10.0.26100.0 ~ 10.0.26100.7623 | - | |
| Microsoft | Windows 11 Version 25H2 | 10.0.26200.0 ~ 10.0.26200.7623 | - | |
| Microsoft | Windows Server 2022 | 10.0.20348.0 ~ 10.0.20348.4648 | - | |
| Microsoft | Windows Server 2022, 23H2 Edition (Server Core installation) | 10.0.25398.0 ~ 10.0.25398.2092 | - | |
| Microsoft | Windows Server 2025 | 10.0.26100.0 ~ 10.0.26100.32230 | - | |
| Microsoft | Windows Server 2025 (Server Core installation) | 10.0.26100.0 ~ 10.0.26100.32230 | - |
II. Public POCs for CVE-2026-20842
| # | POC Description | Source Link | Shenlong Link |
|---|
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No public POC found.
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Same Patch Batch · Microsoft · 2026-01-13 · 112 CVEs total
| CVE-2026-20963 | 9.8 CRITICAL | Microsoft SharePoint Remote Code Execution Vulnerability |
| CVE-2026-20947 | 8.8 HIGH | Microsoft SharePoint Server Remote Code Execution Vulnerability |
| CVE-2026-20868 | 8.8 HIGH | Windows Routing and Remote Access Service (RRAS) Remote Code Execution Vulnerability |
| CVE-2026-20952 | 8.4 HIGH | Microsoft Office Remote Code Execution Vulnerability |
| CVE-2026-20944 | 8.4 HIGH | Microsoft Word Remote Code Execution Vulnerability |
| CVE-2026-20953 | 8.4 HIGH | Microsoft Office Remote Code Execution Vulnerability |
| CVE-2026-20856 | 8.1 HIGH | Windows Server Update Service (WSUS) Remote Code Execution Vulnerability |
| CVE-2026-20931 | 8.0 HIGH | Windows Telephony Service Elevation of Privilege Vulnerability |
| CVE-2026-20832 | 7.8 HIGH | Windows Remote Procedure Call Interface Definition Language (IDL) Elevation of Privilege V |
| CVE-2026-20924 | 7.8 HIGH | Windows Management Services Elevation of Privilege Vulnerability |
| CVE-2026-20922 | 7.8 HIGH | Windows NTFS Remote Code Execution Vulnerability |
| CVE-2026-20843 | 7.8 HIGH | Windows Routing and Remote Access Service (RRAS) Elevation of Privilege Vulnerability |
| CVE-2026-20920 | 7.8 HIGH | Win32k Elevation of Privilege Vulnerability |
| CVE-2026-20837 | 7.8 HIGH | Windows Media Remote Code Execution Vulnerability |
| CVE-2026-21224 | 7.8 HIGH | Azure Connected Machine Agent Elevation of Privilege Vulnerability |
| CVE-2026-20840 | 7.8 HIGH | Windows NTFS Remote Code Execution Vulnerability |
| CVE-2026-20956 | 7.8 HIGH | Microsoft Excel Remote Code Execution Vulnerability |
| CVE-2026-20877 | 7.8 HIGH | Windows Management Services Elevation of Privilege Vulnerability |
| CVE-2026-20951 | 7.8 HIGH | Microsoft SharePoint Server Remote Code Execution Vulnerability |
| CVE-2026-20946 | 7.8 HIGH | Microsoft Excel Remote Code Execution Vulnerability |
Showing top 20 of 112 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Windows 10 Version 21H2
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Windows Kernel Information Disclosure Vulnerability - CVE-2026-32181
Connected User Experiences and Telemetry Service Denial of S - CVE-2026-27931
Windows GDI Information Disclosure Vulnerability
Same vendor: Microsoft
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Azure AI Foundry Elevation of Privilege Vulnerability - CVE-2026-34327
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