CVE-2026-27918— Windows Shell Elevation of Privilege Vulnerability
Quick assessment
Affected
Microsoft Windows 10 Version 1809
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Microsoft Windows Shell是美国微软（Microsoft）公司的Windows操作系统的图形用户界面。Windows shell易于识别的元素包括桌面、任务栏、开始菜单、任务切换器和自动播放等特征。 Microsoft Windows Shell存在竞争条件问题漏洞。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 11 Version 26H1 for ARM64-based Systems,Windows 11 version 26H1 for x64-base
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 14
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Microsoft | Windows 10 Version 1809 | 10.0.17763.0< 10.0.17763.8644 |
affected |
| Microsoft | Windows 10 Version 21H2 | 10.0.19044.0< 10.0.19044.7184 |
affected |
| Microsoft | Windows 10 Version 22H2 | 10.0.19045.0< 10.0.19045.7184 |
affected |
| Microsoft | Windows 11 version 22H3 | 10.0.22631.0< 10.0.22631.6936 |
affected |
| Microsoft | Windows 11 Version 23H2 | 10.0.22631.0< 10.0.22631.6936 |
affected |
| Microsoft | Windows 11 Version 24H2 | 10.0.26100.0< 10.0.26100.8246 |
affected |
| Microsoft | Windows 11 Version 25H2 | 10.0.26200.0< 10.0.26200.8246 |
affected |
| Microsoft | Windows 11 version 26H1 | 10.0.28000.0< 10.0.28000.1836 |
affected |
| Microsoft | Windows Server 2019 | 10.0.17763.0< 10.0.17763.8644 |
affected |
| Microsoft | Windows Server 2019 (Server Core installation) | 10.0.17763.0< 10.0.17763.8644 |
affected |
| Microsoft | Windows Server 2022 | 10.0.20348.0< 10.0.20348.5020 |
affected |
| Microsoft | Windows Server 2022, 23H2 Edition (Server Core installation) | 10.0.25398.0< 10.0.25398.2274 |
affected |
| Microsoft | Windows Server 2025 | 10.0.26100.0< 10.0.26100.32690 |
affected |
| Microsoft | Windows Server 2025 (Server Core installation) | 10.0.26100.0< 10.0.26100.32690 |
affected |
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I. Basic Information for CVE-2026-27918
Vulnerability Information
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Vulnerability Title
Windows Shell Elevation of Privilege Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Shell allows an authorized attacker to elevate privileges locally.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
使用共享资源的并发执行不恰当同步问题(竞争条件)
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft Windows Shell 竞争条件问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Windows Shell是美国微软（Microsoft）公司的Windows操作系统的图形用户界面。Windows shell易于识别的元素包括桌面、任务栏、开始菜单、任务切换器和自动播放等特征。 Microsoft Windows Shell存在竞争条件问题漏洞。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 11 Version 26H1 for ARM64-based Systems,Windows 11 version 26H1 for x64-base
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 1809 | 10.0.17763.0 ~ 10.0.17763.8644 | - |
|
| Microsoft | Windows 10 Version 21H2 | 10.0.19044.0 ~ 10.0.19044.7184 | - |
|
| Microsoft | Windows 10 Version 22H2 | 10.0.19045.0 ~ 10.0.19045.7184 | - |
|
| Microsoft | Windows 11 version 22H3 | 10.0.22631.0 ~ 10.0.22631.6936 | - |
|
| Microsoft | Windows 11 Version 23H2 | 10.0.22631.0 ~ 10.0.22631.6936 | - |
|
| Microsoft | Windows 11 Version 24H2 | 10.0.26100.0 ~ 10.0.26100.8246 | - |
|
| Microsoft | Windows 11 Version 25H2 | 10.0.26200.0 ~ 10.0.26200.8246 | - |
|
| Microsoft | Windows 11 version 26H1 | 10.0.28000.0 ~ 10.0.28000.1836 | - |
|
| Microsoft | Windows Server 2019 | 10.0.17763.0 ~ 10.0.17763.8644 | - |
|
| Microsoft | Windows Server 2019 (Server Core installation) | 10.0.17763.0 ~ 10.0.17763.8644 | - |
|
| Microsoft | Windows Server 2022 | 10.0.20348.0 ~ 10.0.20348.5020 | - |
|
| Microsoft | Windows Server 2022, 23H2 Edition (Server Core installation) | 10.0.25398.0 ~ 10.0.25398.2274 | - |
|
| Microsoft | Windows Server 2025 | 10.0.26100.0 ~ 10.0.26100.32690 | - |
|
| Microsoft | Windows Server 2025 (Server Core installation) | 10.0.26100.0 ~ 10.0.26100.32690 | - |
|
II. Public POCs for CVE-2026-27918
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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No public POC found.
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Same Patch Batch · Microsoft · 2026-04-14 · 163 CVEs total
| CVE-2026-33824 | 9.8 CRITICAL | Windows Internet Key Exchange (IKE) Service Extensions Remote Code Execution Vulnerability |
| CVE-2026-26149 | 9.0 CRITICAL | Microsoft Power Apps Desktop Client Spoofing Vulnerability |
| CVE-2026-32171 | 8.8 HIGH | Azure Logic Apps Elevation of Privilege Vulnerability |
| CVE-2026-26178 | 8.8 HIGH | Windows Advanced Rasterization Platform Elevation of Privilege Vulnerability |
| CVE-2026-26167 | 8.8 HIGH | Windows Push Notifications Elevation of Privilege Vulnerability |
| CVE-2026-32157 | 8.8 HIGH | Remote Desktop Client Remote Code Execution Vulnerability |
| CVE-2026-32225 | 8.8 HIGH | Windows Shell Security Feature Bypass Vulnerability |
| CVE-2026-33120 | 8.8 HIGH | Microsoft SQL Server Remote Code Execution Vulnerability |
| CVE-2026-27928 | 8.7 HIGH | Windows Hello Security Feature Bypass Vulnerability |
| CVE-2026-32221 | 8.4 HIGH | Windows Graphics Component Remote Code Execution Vulnerability |
| CVE-2026-32162 | 8.4 HIGH | Windows COM Elevation of Privilege Vulnerability |
| CVE-2026-32190 | 8.4 HIGH | Microsoft Office Remote Code Execution Vulnerability |
| CVE-2026-33114 | 8.4 HIGH | Microsoft Word Remote Code Execution Vulnerability |
| CVE-2026-33115 | 8.4 HIGH | Microsoft Word Remote Code Execution Vulnerability |
| CVE-2026-32091 | 8.4 HIGH | Microsoft Brokering File System Elevation of Privilege Vulnerability |
| CVE-2026-33827 | 8.1 HIGH | Windows TCP/IP Remote Code Execution Vulnerability |
| CVE-2026-27912 | 8.0 HIGH | Windows Kerberos Elevation of Privilege Vulnerability |
| CVE-2026-33826 | 8.0 HIGH | Windows Active Directory Remote Code Execution Vulnerability |
| CVE-2026-26162 | 7.8 HIGH | Windows OLE Elevation of Privilege Vulnerability |
| CVE-2026-33095 | 7.8 HIGH | Microsoft Word Remote Code Execution Vulnerability |
Showing top 20 of 163 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Windows 10 Version 1809
-
CVE-2026-69530
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CVE-2026-81354
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CVE-2026-78451
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CVE-2026-78450
Windows Reliable Multicast Transport Driver (RMCAST) Remote
Same vendor: Microsoft
-
CVE-2026-100208
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CVE-2026-70125
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CVE-2026-88097
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M365 Copilot Information Disclosure Vulnerability -
CVE-2026-83946
Azure Portal Spoofing Vulnerability
Same weakness: CWE-362
V. Comments for CVE-2026-27918
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