CVE-2026-42837— Windows Projected File System 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是美国微软（Microsoft）公司的一套个人设备使用的操作系统。 Microsoft Windows Projected File System Filter Driver存在缓冲区错误漏洞。以下产品和版本受到影响：Windows Server 2019 (Server Core installation),Windows 10 Version 21H2 for 32-bit Systems,Windows 10 Version 21H2 for ARM64-based
Possible ATT&CK Techniques 1 AI
T1068 · Exploitation for Privilege EscalationAffected Version Matrix 13
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Microsoft | Windows 10 Version 1809 | 10.0.17763.0< 10.0.17763.8880 |
affected |
| Microsoft | Windows 10 Version 21H2 | 10.0.19044.0< 10.0.19044.7417 |
affected |
| Microsoft | Windows 10 Version 22H2 | 10.0.19045.0< 10.0.19045.7417 |
affected |
| Microsoft | Windows 11 version 23H2 | 10.0.22631.0< 10.0.22631.7219 |
affected |
| Microsoft | Windows 11 Version 23H2 | 10.0.22631.0< 10.0.22631.7219 |
affected |
| Microsoft | Windows 11 Version 24H2 | 10.0.26100.0< 10.0.26100.8655 |
affected |
| Microsoft | Windows 11 Version 25H2 | 10.0.26200.0< 10.0.26200.8655 |
affected |
| Microsoft | Windows 11 version 26H1 | 10.0.28000.0< 10.0.28000.2269 |
affected |
| Microsoft | Windows Server 2019 | 10.0.17763.0< 10.0.17763.8880 |
affected |
| Microsoft | Windows Server 2019 (Server Core installation) | 10.0.17763.0< 10.0.17763.8880 |
affected |
| Microsoft | Windows Server 2022 | 10.0.20348.0< 10.0.20348.5256 |
affected |
| Microsoft | Windows Server 2025 | 10.0.26100.0< 10.0.26100.32995 |
affected |
| Microsoft | Windows Server 2025 (Server Core installation) | 10.0.26100.0< 10.0.26100.32995 |
affected |
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I. Basic Information for CVE-2026-42837
Vulnerability Information
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Vulnerability Title
Windows Projected File System Elevation of Privilege Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Out-of-bounds read in Windows Projected File System Filter Driver 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
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft Windows 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Windows是美国微软（Microsoft）公司的一套个人设备使用的操作系统。 Microsoft Windows Projected File System Filter Driver存在缓冲区错误漏洞。以下产品和版本受到影响：Windows Server 2019 (Server Core installation),Windows 10 Version 21H2 for 32-bit Systems,Windows 10 Version 21H2 for ARM64-based
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 ~ 10.0.17763.8880 | - |
|
| Microsoft | Windows 10 Version 21H2 | 10.0.19044.0 ~ 10.0.19044.7417 | - |
|
| Microsoft | Windows 10 Version 22H2 | 10.0.19045.0 ~ 10.0.19045.7417 | - |
|
| Microsoft | Windows 11 version 23H2 | 10.0.22631.0 ~ 10.0.22631.7219 | - |
|
| Microsoft | Windows 11 Version 23H2 | 10.0.22631.0 ~ 10.0.22631.7219 | - |
|
| Microsoft | Windows 11 Version 24H2 | 10.0.26100.0 ~ 10.0.26100.8655 | - |
|
| Microsoft | Windows 11 Version 25H2 | 10.0.26200.0 ~ 10.0.26200.8655 | - |
|
| Microsoft | Windows 11 version 26H1 | 10.0.28000.0 ~ 10.0.28000.2269 | - |
|
| Microsoft | Windows Server 2019 | 10.0.17763.0 ~ 10.0.17763.8880 | - |
|
| Microsoft | Windows Server 2019 (Server Core installation) | 10.0.17763.0 ~ 10.0.17763.8880 | - |
|
| Microsoft | Windows Server 2022 | 10.0.20348.0 ~ 10.0.20348.5256 | - |
|
| Microsoft | Windows Server 2025 | 10.0.26100.0 ~ 10.0.26100.32995 | - |
|
| Microsoft | Windows Server 2025 (Server Core installation) | 10.0.26100.0 ~ 10.0.26100.32995 | - |
|
II. Public POCs for CVE-2026-42837
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2026-42837 (1)
Same Patch Batch · Microsoft · 2026-06-09 · 200 CVEs total
| CVE-2026-47643 | 9.8 CRITICAL | Azure Stack Edge Remote Code Execution Vulnerability |
| CVE-2026-26142 | 9.8 CRITICAL | Nuance PowerScribe Remote Code Execution Vulnerability |
| CVE-2026-47291 | 9.8 CRITICAL | HTTP.sys Remote Code Execution Vulnerability |
| CVE-2026-45657 | 9.8 CRITICAL | Windows Kernel Remote Code Execution Vulnerability |
| CVE-2026-44815 | 9.8 CRITICAL | DHCP Client Service Remote Code Execution Vulnerability |
| CVE-2026-47281 | 9.6 CRITICAL | Visual Studio Code Elevation of Privilege Vulnerability |
| CVE-2026-42904 | 9.6 CRITICAL | Windows TCP/IP Elevation of Privilege Vulnerability |
| CVE-2026-45602 | 9.1 CRITICAL | Windows Dynamic Host Configuration Protocol (DHCP) Tampering Vulnerability |
| CVE-2026-45484 | 8.8 HIGH | Microsoft SharePoint Elevation of Privilege Vulnerability |
| CVE-2026-47653 | 8.8 HIGH | Remote Desktop Client Remote Code Execution Vulnerability |
| CVE-2026-32193 | 8.8 HIGH | Azure Kubernetes Service (AKS) Remote Code Execution Vulnerability |
| CVE-2026-47289 | 8.8 HIGH | Remote Desktop Client Remote Code Execution Vulnerability |
| CVE-2026-45648 | 8.8 HIGH | Windows Active Directory Domain Services Remote Code Execution Vulnerability |
| CVE-2026-45504 | 8.8 HIGH | Microsoft Exchange Server Elevation of Privilege Vulnerability |
| CVE-2026-42985 | 8.8 HIGH | Remote Desktop Client Remote Code Execution Vulnerability |
| CVE-2026-40371 | 8.8 HIGH | Microsoft Dynamics 365 (on-premises) Elevation of Privilege Vulnerability |
| CVE-2026-45641 | 8.4 HIGH | Windows Hyper-V Remote Code Execution Vulnerability |
| CVE-2026-45607 | 8.4 HIGH | Windows Hyper-V Remote Code Execution Vulnerability |
| CVE-2026-41098 | 8.4 HIGH | Azure Stack Edge Spoofing Vulnerability |
| CVE-2026-47635 | 8.4 HIGH | Microsoft Outlook and Word Remote Code Execution Vulnerability |
Showing top 20 of 200 CVEs. View all on vendor page → →
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V. Comments for CVE-2026-42837
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