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CVE-2021-26867— Windows Hyper-V Remote Code Execution Vulnerability

Quick assessment

Affected
Microsoft Windows 10 Version 1909
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 Hyper-V是美国微软（Microsoft）公司的一款可提供硬件虚拟化的工具。该软件允许创建虚拟硬盘驱动器、虚拟交换机以及许多其他虚拟设备。 Windows Hyper-V 存在安全漏洞。以下产品和版本受到影响：Windows 10 Version 1909 for x64-based Systems,Windows Server, version 1909 (Server Core installation),Windows 10 Version 2004 for

CVSS 9.9 · Critical EPSS 2.84% · P86

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 5

VendorProduct Version RangeStatus
Microsoft Windows 10 Version 1909 10.0.0< 10.0.18363.1440 affected
Microsoft Windows 10 Version 2004 10.0.0< 10.0.19043.867 affected
Microsoft Windows Server version 2004 10.0.0< 10.0.19043.867 affected
Microsoft Windows Server version 20H2 10.0.0< 10.0.19043.867 affected
Microsoft Windows Server, version 1909 (Server Core installation) 10.0.0< 10.0.18363.1440 affected
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I. Basic Information for CVE-2021-26867

Vulnerability Information
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Vulnerability Title
Windows Hyper-V Remote Code Execution Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Windows Hyper-V Remote Code Execution Vulnerability
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Windows Hyper-V 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Windows Hyper-V是美国微软（Microsoft）公司的一款可提供硬件虚拟化的工具。该软件允许创建虚拟硬盘驱动器、虚拟交换机以及许多其他虚拟设备。 Windows Hyper-V 存在安全漏洞。以下产品和版本受到影响：Windows 10 Version 1909 for x64-based Systems,Windows Server, version 1909 (Server Core installation),Windows 10 Version 2004 for
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 1909 10.0.0 ~ 10.0.18363.1440 -
Microsoft Windows 10 Version 2004 10.0.0 ~ 10.0.19043.867 -
Microsoft Windows Server version 2004 10.0.0 ~ 10.0.19043.867 -
Microsoft Windows Server version 20H2 10.0.0 ~ 10.0.19043.867 -
Microsoft Windows Server, version 1909 (Server Core installation) 10.0.0 ~ 10.0.18363.1440 -

II. Public POCs for CVE-2021-26867

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III. Intelligence Information for CVE-2021-26867

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Vendor Advisories for CVE-2021-26867 (2)

Same Patch Batch · Microsoft · 2021-03-11 · 80 CVEs total

CVE-2021-26877 9.8 CRITICAL Windows DNS Server Remote Code Execution Vulnerability
CVE-2021-26897 9.8 CRITICAL Windows DNS Server Remote Code Execution Vulnerability
CVE-2021-26893 9.8 CRITICAL Windows DNS Server Remote Code Execution Vulnerability
CVE-2021-26894 9.8 CRITICAL Windows DNS Server Remote Code Execution Vulnerability
CVE-2021-26895 9.8 CRITICAL Windows DNS Server Remote Code Execution Vulnerability
CVE-2021-27080 9.3 CRITICAL Azure Sphere Unsigned Code Execution Vulnerability
CVE-2021-26865 8.8 HIGH Windows Container Execution Agent Elevation of Privilege Vulnerability
CVE-2021-27085 8.8 HIGH Internet Explorer Remote Code Execution Vulnerability
CVE-2021-26411 8.8 HIGH Internet Explorer Memory Corruption Vulnerability
CVE-2021-26876 8.8 HIGH OpenType Font Parsing Remote Code Execution Vulnerability
CVE-2021-27076 8.8 HIGH Microsoft SharePoint Server Remote Code Execution Vulnerability
CVE-2021-26864 8.4 HIGH Windows Virtual Registry Provider Elevation of Privilege Vulnerability
CVE-2021-26891 7.8 HIGH Windows Container Execution Agent Elevation of Privilege Vulnerability
CVE-2021-26860 7.8 HIGH Windows App-V Overlay Filter Elevation of Privilege Vulnerability
CVE-2021-26885 7.8 HIGH Windows WalletService Elevation of Privilege Vulnerability
CVE-2021-26887 7.8 HIGH Microsoft Windows Folder Redirection Elevation of Privilege Vulnerability
CVE-2021-26889 7.8 HIGH Windows Update Stack Elevation of Privilege Vulnerability
CVE-2021-26890 7.8 HIGH Application Virtualization Remote Code Execution Vulnerability
CVE-2021-27058 7.8 HIGH Microsoft Office ClickToRun Remote Code Execution Vulnerability
CVE-2021-26868 7.8 HIGH Windows Graphics Component Elevation of Privilege Vulnerability

Showing top 20 of 80 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Windows 10 Version 1909
Same vendor: Microsoft

V. Comments for CVE-2021-26867

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