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TI-2021-11964 Aliases CVE-2021-31977GHSA-g6wj-mvwm-xg5q

Windows Hyper-V Denial of Service Vulnerability

Priority MEDIUM 43CWE-119Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.

Summary

Windows Hyper-V Denial of Service Vulnerability

Why it matters now

EPSS 0.03179 88th percentileScored 2026-11-07
Fix Fixed Windows 10 Version 1809 (Microsoft): 10.0.17763.1999Windows Server 2019 (Microsoft): 10.0.17763.1999+10 more products

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
MicrosoftWindows 10 Version 180910.0.0 to before 10.0.17763.199910.0.17763.1999Patch availableCNA
MicrosoftWindows Server 201910.0.0 to before 10.0.17763.199910.0.17763.1999Patch availableCNA
MicrosoftWindows Server 2019 (Server Core installation)10.0.0 to before 10.0.17763.199910.0.17763.1999Patch availableCNA
MicrosoftWindows 10 Version 190910.0.0 to before 10.0.18363.162110.0.18363.1621Patch availableCNA
MicrosoftWindows 10 Version 21H110.0.0 to before 10.0.19043.105210.0.19043.1052Patch availableCNA
MicrosoftWindows 10 Version 200410.0.0 to before 10.0.19041.105210.0.19041.1052Patch availableCNA
MicrosoftWindows Server version 200410.0.0 to before 10.0.19041.105210.0.19041.1052Patch availableCNA
MicrosoftWindows Server version 20H210.0.0 to before 10.0.19042.105210.0.19042.1052Patch availableCNA
MicrosoftWindows 10 Version 150710.0.0 to before 10.0.10240.1896710.0.10240.18967Patch availableCNA
MicrosoftWindows 10 Version 160710.0.0 to before 10.0.14393.446710.0.14393.4467Patch availableCNA
MicrosoftWindows Server 201610.0.0 to before 10.0.14393.446710.0.14393.4467Patch availableCNA
MicrosoftWindows Server 2016 (Server Core installation)10.0.0 to before 10.0.14393.446710.0.14393.4467Patch availableCNA
  • Windows 10 Version 1809 VendorMicrosoft Affected 10.0.0 to before 10.0.17763.1999 Fixed in 10.0.17763.1999 Patch available CNA
  • Windows Server 2019 VendorMicrosoft Affected 10.0.0 to before 10.0.17763.1999 Fixed in 10.0.17763.1999 Patch available CNA
  • Windows Server 2019 (Server Core installation) VendorMicrosoft Affected 10.0.0 to before 10.0.17763.1999 Fixed in 10.0.17763.1999 Patch available CNA
  • Windows 10 Version 1909 VendorMicrosoft Affected 10.0.0 to before 10.0.18363.1621 Fixed in 10.0.18363.1621 Patch available CNA
  • Windows 10 Version 21H1 VendorMicrosoft Affected 10.0.0 to before 10.0.19043.1052 Fixed in 10.0.19043.1052 Patch available CNA
  • Windows 10 Version 2004 VendorMicrosoft Affected 10.0.0 to before 10.0.19041.1052 Fixed in 10.0.19041.1052 Patch available CNA
  • Windows Server version 2004 VendorMicrosoft Affected 10.0.0 to before 10.0.19041.1052 Fixed in 10.0.19041.1052 Patch available CNA
  • Windows Server version 20H2 VendorMicrosoft Affected 10.0.0 to before 10.0.19042.1052 Fixed in 10.0.19042.1052 Patch available CNA
  • Windows 10 Version 1507 VendorMicrosoft Affected 10.0.0 to before 10.0.10240.18967 Fixed in 10.0.10240.18967 Patch available CNA
  • Windows 10 Version 1607 VendorMicrosoft Affected 10.0.0 to before 10.0.14393.4467 Fixed in 10.0.14393.4467 Patch available CNA
  • Windows Server 2016 VendorMicrosoft Affected 10.0.0 to before 10.0.14393.4467 Fixed in 10.0.14393.4467 Patch available CNA
  • Windows Server 2016 (Server Core installation) VendorMicrosoft Affected 10.0.0 to before 10.0.14393.4467 Fixed in 10.0.14393.4467 Patch available CNA

CPE configurations NVD · 12

CPEVersionsRoleVendor
cpe:2.3:o:microsoft:windows_10:-:*:*:*:*:*:*:*not specified by NVDVulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10:20h2:*:*:*:*:*:*:*20h2VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10:21h1:*:*:*:*:*:*:*21h1VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10:1607:*:*:*:*:*:*:*1607VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10:1809:*:*:*:*:*:*:*1809VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10:1909:*:*:*:*:*:*:*1909VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10:2004:*:*:*:*:*:*:*2004VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*not specified by NVDVulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2016:20h2:*:*:*:*:*:*:*20h2VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2016:1909:*:*:*:*:*:*:*1909VulnerableMicrosoft
  • cpe:2.3:o:microsoft:windows_10:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10:20h2:*:*:*:*:*:*:* Versions 20h2 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10:21h1:*:*:*:*:*:*:* Versions 21h1 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10:1607:*:*:*:*:*:*:* Versions 1607 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10:1809:*:*:*:*:*:*:* Versions 1809 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10:1909:*:*:*:*:*:*:* Versions 1909 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10:2004:*:*:*:*:*:*:* Versions 2004 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2016:20h2:*:*:*:*:*:*:* Versions 20h2 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2016:1909:*:*:*:*:*:*:* Versions 1909 Vulnerable ·Microsoft
Show 2 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:microsoft:windows_server_2016:2004:*:*:*:*:*:*:*2004VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:*not specified by NVDVulnerableMicrosoft
  • cpe:2.3:o:microsoft:windows_server_2016:2004:*:*:*:*:*:*:* Versions 2004 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft

Remediation

  • Fix · CNA Windows 10 Version 1809 (Microsoft) Fixed in 10.0.17763.1999
  • Fix · CNA Windows Server 2019 (Microsoft) Fixed in 10.0.17763.1999
  • Fix · CNA Windows Server 2019 (Server Core installation) (Microsoft) Fixed in 10.0.17763.1999
  • Fix · CNA Windows 10 Version 1909 (Microsoft) Fixed in 10.0.18363.1621
  • Fix · CNA Windows 10 Version 21H1 (Microsoft) Fixed in 10.0.19043.1052
  • Fix · CNA Windows 10 Version 2004 (Microsoft) Fixed in 10.0.19041.1052
  • Fix · CNA Windows Server version 2004 (Microsoft) Fixed in 10.0.19041.1052
  • Fix · CNA Windows Server version 20H2 (Microsoft) Fixed in 10.0.19042.1052
  • Fix · CNA Windows 10 Version 1507 (Microsoft) Fixed in 10.0.10240.18967
  • Fix · CNA Windows 10 Version 1607 (Microsoft) Fixed in 10.0.14393.4467
  • Fix · CNA Windows Server 2016 (Microsoft) Fixed in 10.0.14393.4467
  • Fix · CNA Windows Server 2016 (Server Core installation) (Microsoft) Fixed in 10.0.14393.4467

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-31977
  2. 2026-10-03 Alias added: GHSA-g6wj-mvwm-xg5q

References

Patch 1

  • TI-2015-02132 Buffer underflow in atmfd.dll in the Windows Adobe Type Manager Library in Microsoft… KEVCVSS 3.1HIGH 8.8
  • TI-2022-10056 Remote Procedure Call Runtime Remote Code Execution Vulnerability CVSS 3.1CRITICAL 9.8
  • TI-2022-06273 HTTP Protocol Stack Remote Code Execution Vulnerability CVSS 3.1CRITICAL 9.8
  • TI-2019-00906 Remote Desktop Services Remote Code Execution Vulnerability CVSS 3.1CRITICAL 9.8
  • TI-2022-15533 Windows Internet Key Exchange (IKE) Protocol Extensions Remote Code Execution Vulnerability CVSS 3.1CRITICAL 9.8
  • TI-2015-01587 Mount Manager in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows… KEVCVSS 3.1MEDIUM 6.6
See all 2973 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences