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CVE-2021-43239— Windows Recovery Environment Agent Elevation of Privilege Vulnerability

Quick assessment

Affected
Microsoft Windows 10 Version 21H1
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 Update是美国微软（Microsoft）公司的一个程序更新服务。 Microsoft Windows Update Stack存在权限许可和访问控制问题漏洞。以下产品和版本受到影响：Windows 10 Version 2004 for 32-bit Systems,Windows 10 Version 2004 for ARM64-based Systems,Windows 10 Version 2004 for x64-based Systems,Windows

CVSS 7.1 · High EPSS 0.54% · P43
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I. Basic Information for CVE-2021-43239

Vulnerability Information
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Vulnerability Title
Windows Recovery Environment Agent Elevation of Privilege Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Windows Recovery Environment Agent Elevation of Privilege Vulnerability
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft Windows Update 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Windows Update是美国微软（Microsoft）公司的一个程序更新服务。 Microsoft Windows Update Stack存在权限许可和访问控制问题漏洞。以下产品和版本受到影响：Windows 10 Version 2004 for 32-bit Systems,Windows 10 Version 2004 for ARM64-based Systems,Windows 10 Version 2004 for x64-based Systems,Windows
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 21H1 10.0.0 ~ 10.0.19043.1415 cpe:2.3:o:microsoft:windows_10_21H1:10.0.19043.1415:*:*:*:*:*:x64:*
Microsoft Windows Server 2022 10.0.0 ~ 10.0.20348.405 cpe:2.3:o:microsoft:windows_server_2022:10.0.20348.405:*:*:*:*:*:*:*
Microsoft Windows 10 Version 2004 10.0.0 ~ 10.0.19041.1415 cpe:2.3:o:microsoft:windows_10_1809:10.0.19041.1415:*:*:*:*:*:x64:*
Microsoft Windows Server version 2004 10.0.0 ~ 10.0.19041.1415 cpe:2.3:o:microsoft:windows_server_2004:10.0.19041.1415:*:*:*:*:*:*:*
Microsoft Windows 10 Version 20H2 10.0.0 ~ 10.0.19042.1415 cpe:2.3:o:microsoft:windows_10_20H2:10.0.19042.1415:*:*:*:*:*:x86:*
Microsoft Windows Server version 20H2 10.0.0 ~ 10.0.19042.1415 cpe:2.3:o:microsoft:windows_server_20H2:10.0.19042.1415:*:*:*:*:*:*:*
Microsoft Windows 11 version 21H2 10.0.0 ~ 10.0.22000.376 cpe:2.3:o:microsoft:windows_11_21H2:10.0.22000.376:*:*:*:*:*:x64:*
Microsoft Windows 10 Version 21H2 10.0.0 ~ 10.0.19044.1415 cpe:2.3:o:microsoft:windows_10_21H2:10.0.19044.1415:*:*:*:*:*:x86:*

II. Public POCs for CVE-2021-43239

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III. Intelligence Information for CVE-2021-43239

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Vendor Advisories for CVE-2021-43239 (1)

Same Patch Batch · Microsoft · 2021-12-15 · 67 CVEs total

CVE-2021-42313 10.0 CRITICAL Microsoft Defender for IoT Remote Code Execution Vulnerability
CVE-2021-42311 10.0 CRITICAL Microsoft Defender for IoT Remote Code Execution Vulnerability
CVE-2021-43215 9.8 CRITICAL iSNS Server Memory Corruption Vulnerability Can Lead to Remote Code Execution
CVE-2021-43907 9.8 CRITICAL Visual Studio Code WSL Extension Remote Code Execution Vulnerability
CVE-2021-43899 9.8 CRITICAL Microsoft 4K Wireless Display Adapter Remote Code Execution Vulnerability
CVE-2021-43905 9.6 CRITICAL Microsoft Office app Remote Code Execution Vulnerability
CVE-2021-43882 9.0 CRITICAL Microsoft Defender for IoT Remote Code Execution Vulnerability
CVE-2021-42315 8.8 HIGH Microsoft Defender for IoT Remote Code Execution Vulnerability
CVE-2021-42314 8.8 HIGH Microsoft Defender for IoT Remote Code Execution Vulnerability
CVE-2021-41365 8.8 HIGH Microsoft Defender for IoT Remote Code Execution Vulnerability
CVE-2021-42309 8.8 HIGH Microsoft SharePoint Server Remote Code Execution Vulnerability
CVE-2021-43877 8.8 HIGH ASP.NET Core and Visual Studio Elevation of Privilege Vulnerability
CVE-2021-43217 8.1 HIGH Windows Encrypting File System (EFS) Remote Code Execution Vulnerability
CVE-2021-42310 8.1 HIGH Microsoft Defender for IoT Remote Code Execution Vulnerability
CVE-2021-42320 8.0 HIGH Microsoft SharePoint Server Spoofing Vulnerability
CVE-2021-43232 7.8 HIGH Windows Event Tracing Remote Code Execution Vulnerability
CVE-2021-43226 7.8 HIGH Windows Common Log File System Driver Elevation of Privilege Vulnerability
CVE-2021-43231 7.8 HIGH Windows NTFS Elevation of Privilege Vulnerability
CVE-2021-43223 7.8 HIGH Windows Remote Access Connection Manager Elevation of Privilege Vulnerability
CVE-2021-43230 7.8 HIGH Windows NTFS Elevation of Privilege Vulnerability

Showing top 20 of 67 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Windows 10 Version 21H1
Same vendor: Microsoft

V. Comments for CVE-2021-43239

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