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Vulnerability · Published May 11, 2021 · Assigned by microsoft

CVE-2021-28476Windows Hyper-V Remote Code Execution Vulnerability

Critical 9.9

In plain English

A critical-severity security flaw in Windows 10 Version 1507 from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 39.2% (higher than 99% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.

Severity (CVSS 3.1)9.9Critical
Exploit odds (30 days)39.2%top 1.4% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack tooling1Public PoC

Official description

Windows Hyper-V Remote Code Execution Vulnerability

Affected products (as reported)

VendorProductVersions
Microsoft Windows 10 Version 1803 10.0.0 – before 10.0.17134.2207
Microsoft Windows 10 Version 1809 10.0.0 – before 10.0.17763.1935
Microsoft Windows Server 2019 10.0.0 – before 10.0.17763.1935
Microsoft Windows Server 2019 (Server Core installation) 10.0.0 – before 10.0.17763.1935
Microsoft Windows 10 Version 1909 10.0.0 – before 10.0.18363.1556
Microsoft Windows Server, version 1909 (Server Core installation) 10.0.0 – before 10.0.18363.1556
Microsoft Windows 10 Version 2004 10.0.0 – before 10.0.19041.982
Microsoft Windows Server version 2004 10.0.0 – before 10.0.19041.982
Microsoft Windows Server version 20H2 10.0.0 – before 10.0.19042.982
Microsoft Windows 10 Version 1507 10.0.0 – before 10.0.10240.18931
Microsoft Windows 10 Version 1607 10.0.0 – before 10.0.14393.4401
Microsoft Windows Server 2016 10.0.0 – before 10.0.14393.4401
Microsoft Windows Server 2016 (Server Core installation) 10.0.0 – before 10.0.14393.4401
Microsoft Windows 7 Service Pack 1 6.1.0 – before 6.1.7601.245976.1.0 – before 6.1.7601.24598
Microsoft Windows 8.1 6.3.0 – before 6.3.9600.20017
Microsoft Windows Server 2008 Service Pack 2 6.0.0 – before 6.0.6003.21117
Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) 6.0.0 – before 6.0.6003.21117
Microsoft Windows Server 2008 R2 Service Pack 1 6.1.0 – before 6.1.7601.245976.1.0 – before 6.1.7601.24598
Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) 6.0.0 – before 6.1.7601.245976.0.0 – before 6.1.7601.24598
Microsoft Windows Server 2012 6.2.0 – before 6.2.9200.23347
Microsoft Windows Server 2012 (Server Core installation) 6.2.0 – before 6.2.9200.23347
Microsoft Windows Server 2012 R2 6.3.0 – before 6.3.9600.20017
Microsoft Windows Server 2012 R2 (Server Core installation) 6.3.0 – before 6.3.9600.20017

References