CVE-2026-20939— Windows File Explorer Information Disclosure Vulnerability
Quick assessment
Affected
Microsoft Windows 10 Version 1607
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 File Explorer是美国微软（Microsoft）公司的一个文件管理器应用程序。 Microsoft Windows File Explorer存在信息泄露漏洞。攻击者利用该漏洞可以获取敏感信息。以下产品和版本受到影响：Windows 10 Version 1809 for 32-bit Systems,Windows 10 Version 1809 for x64-based Systems,Windows Server 2019,Windows Server
Possible ATT&CK Techniques 1 AI
T1005 · Data from Local SystemAffected Version Matrix 16
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Microsoft | Windows 10 Version 1607 | 10.0.14393.0< 10.0.14393.8783 |
affected |
| Microsoft | Windows 10 Version 1809 | 10.0.17763.0< 10.0.17763.8276 |
affected |
| Microsoft | Windows 10 Version 21H2 | 10.0.19044.0< 10.0.19044.6809 |
affected |
| Microsoft | Windows 10 Version 22H2 | 10.0.19045.0< 10.0.19045.6809 |
affected |
| Microsoft | Windows 11 version 23H2 | 10.0.22631.0< 10.0.22631.6491 |
affected |
| Microsoft | Windows 11 Version 23H2 | 10.0.22631.0< 10.0.22631.6491 |
affected |
| Microsoft | Windows 11 Version 24H2 | 10.0.26100.0< 10.0.26100.7623 |
affected |
| Microsoft | Windows 11 Version 25H2 | 10.0.26200.0< 10.0.26200.7623 |
affected |
| Microsoft | Windows Server 2016 | 10.0.14393.0< 10.0.14393.8783 |
affected |
| Microsoft | Windows Server 2016 (Server Core installation) | 10.0.14393.0< 10.0.14393.8783 |
affected |
| Microsoft | Windows Server 2019 | 10.0.17763.0< 10.0.17763.8276 |
affected |
| Microsoft | Windows Server 2019 (Server Core installation) | 10.0.17763.0< 10.0.17763.8276 |
affected |
| Microsoft | Windows Server 2022 | 10.0.20348.0< 10.0.20348.4648 |
affected |
| Microsoft | Windows Server 2022, 23H2 Edition (Server Core installation) | 10.0.25398.0< 10.0.25398.2092 |
affected |
| Microsoft | Windows Server 2025 | 10.0.26100.0< 10.0.26100.32230 |
affected |
| Microsoft | Windows Server 2025 (Server Core installation) | 10.0.26100.0< 10.0.26100.32230 |
affected |
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I. Basic Information for CVE-2026-20939
Vulnerability Information
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Vulnerability Title
Windows File Explorer Information Disclosure Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Exposure of sensitive information to an unauthorized actor in Windows File Explorer allows an authorized attacker to disclose information 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:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft Windows File Explorer 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Windows File Explorer是美国微软（Microsoft）公司的一个文件管理器应用程序。 Microsoft Windows File Explorer存在信息泄露漏洞。攻击者利用该漏洞可以获取敏感信息。以下产品和版本受到影响：Windows 10 Version 1809 for 32-bit Systems,Windows 10 Version 1809 for x64-based Systems,Windows Server 2019,Windows Server
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 1607 | 10.0.14393.0 ~ 10.0.14393.8783 | - |
|
| Microsoft | Windows 10 Version 1809 | 10.0.17763.0 ~ 10.0.17763.8276 | - |
|
| 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 23H2 | 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 2016 | 10.0.14393.0 ~ 10.0.14393.8783 | - |
|
| Microsoft | Windows Server 2016 (Server Core installation) | 10.0.14393.0 ~ 10.0.14393.8783 | - |
|
| Microsoft | Windows Server 2019 | 10.0.17763.0 ~ 10.0.17763.8276 | - |
|
| Microsoft | Windows Server 2019 (Server Core installation) | 10.0.17763.0 ~ 10.0.17763.8276 | - |
|
| 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-2026-20939
| # | 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 · 2026-01-13 · 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-2026-20953 | 8.4 HIGH | Microsoft Office Remote Code Execution Vulnerability |
| CVE-2026-20944 | 8.4 HIGH | Microsoft Word 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-2026-20859 | 7.8 HIGH | Windows Kernel-Mode Driver Elevation of Privilege Vulnerability |
| CVE-2026-21224 | 7.8 HIGH | Azure Connected Machine Agent Elevation of Privilege Vulnerability |
| CVE-2026-20837 | 7.8 HIGH | Windows Media Remote Code Execution Vulnerability |
| CVE-2026-20956 | 7.8 HIGH | Microsoft Excel Remote Code Execution Vulnerability |
| CVE-2026-20840 | 7.8 HIGH | Windows NTFS Remote Code Execution Vulnerability |
| CVE-2026-20955 | 7.8 HIGH | Microsoft Excel Remote Code Execution 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 |
| CVE-2026-20857 | 7.8 HIGH | Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability |
| CVE-2026-20918 | 7.8 HIGH | Windows Management Services Elevation of Privilege Vulnerability |
| CVE-2026-20920 | 7.8 HIGH | Win32k Elevation of Privilege Vulnerability |
| CVE-2026-20922 | 7.8 HIGH | Windows NTFS Remote Code Execution Vulnerability |
Showing top 20 of 112 CVEs. View all on vendor page → →
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