Description
A denial of service vulnerability exists when Hyper-V on a Windows Server fails to properly handle specially crafted network packets.
To exploit the vulnerability, an attacker would send specially crafted network packets to the Hyper-V Server.
The security update addresses the vulnerability by resolving the conditions where Hyper-V would fail to properly handle these network packets.
Published: 2020-05-21
Score: 7.5 High
EPSS: 4.4% Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Wed, 19 Aug 2026 16:45:00 +0000

Type Values Removed Values Added
Description A denial of service vulnerability exists when Hyper-V on a Windows Server fails to properly handle specially crafted network packets.To exploit the vulnerability, an attacker would send specially crafted network packets to the Hyper-V Server.The security update addresses the vulnerability by resolving the conditions where Hyper-V would fail to properly handle these network packets., aka 'Windows Hyper-V Denial of Service Vulnerability'. A denial of service vulnerability exists when Hyper-V on a Windows Server fails to properly handle specially crafted network packets. To exploit the vulnerability, an attacker would send specially crafted network packets to the Hyper-V Server. The security update addresses the vulnerability by resolving the conditions where Hyper-V would fail to properly handle these network packets.
Title Windows Hyper-V Denial of Service Vulnerability
First Time appeared Microsoft windows 10 1507
Microsoft windows 10 1607
Microsoft windows 10 1803
Microsoft windows 10 1809
Microsoft windows 10 1909
Microsoft windows Server 1803
Microsoft windows Server 1903
Microsoft windows Server 1909
Microsoft windows Server 2008 R2
Microsoft windows Server 2008 Sp2
Microsoft windows Server 2012 R2
CPEs cpe:2.3:o:microsoft:windows_10:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_1803:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_1909:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_7:*:sp1:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_8.1:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_1803:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_1903:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_1909:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*
Vendors & Products Microsoft windows 10 1507
Microsoft windows 10 1607
Microsoft windows 10 1803
Microsoft windows 10 1809
Microsoft windows 10 1909
Microsoft windows Server 1803
Microsoft windows Server 1903
Microsoft windows Server 1909
Microsoft windows Server 2008 R2
Microsoft windows Server 2008 Sp2
Microsoft windows Server 2012 R2
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C'}


Subscriptions

Microsoft Windows 10 Windows 10 1507 Windows 10 1607 Windows 10 1803 Windows 10 1809 Windows 10 1909 Windows 7 Windows 8.1 Windows Server 1803 Windows Server 1903 Windows Server 1909 Windows Server 2008 Windows Server 2008 R2 Windows Server 2008 Sp2 Windows Server 2012 Windows Server 2012 R2 Windows Server 2016 Windows Server 2019
cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2026-08-19T16:33:16.639Z

Reserved: 2019-11-04T00:00:00.000Z

Link: CVE-2020-0909

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2020-05-21T23:15:11.273

Modified: 2026-08-19T17:17:07.417

Link: CVE-2020-0909

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses