CVE-2021-28476

At a glance

Severity: CRITICAL 9.9
EPSS: EPSS 39.23 % · percentile 99 (2026-10-27)
State: PUBLISHED
Published: 2021-05-11
Updated: 2024-08-03
Assigner: microsoft
NVD status: Modified

Description

Windows Hyper-V Remote Code Execution Vulnerability

Scores

Version	Score	Vector	Scored by
CVSS 3.1	CRITICAL 9.9	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C	microsoft
CVSS 3.1	CRITICAL 9.9	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H	NVD · secure@microsoft.com (Secondary)
CVSS 3.1	CRITICAL 9.9	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H	NVD · nvd@nist.gov (Secondary)
CVSS 2.0	MEDIUM 6.5	AV:N/AC:L/Au:S/C:P/I:P/A:P	NVD · nvd@nist.gov (Primary)

European references

ENISA EUVD · EUVD-2021-15154
GCVE · GCVE-0-2021-28476

CERT-FR advisories

CERTFR-2021-AVI-367 — Multiples vulnérabilités dans Microsoft Windows · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

cpe:2.3:o:microsoft:windows_10:-:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10:20h2:*:*:*:*:*: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_10:2004:*:*:*:*:*: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_2008:-:sp2:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2016:20h2:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2016:1909:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2016:2004:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:*

Affected products

Product	Versions
Microsoft · Windows 10 Version 1803	affected 10.0.0 < 10.0.17134.2207
Microsoft · Windows 10 Version 1809	affected 10.0.0 < 10.0.17763.1935
Microsoft · Windows Server 2019	affected 10.0.0 < 10.0.17763.1935
Microsoft · Windows Server 2019 (Server Core installation)	affected 10.0.0 < 10.0.17763.1935
Microsoft · Windows 10 Version 1909	affected 10.0.0 < 10.0.18363.1556
Microsoft · Windows Server, version 1909 (Server Core installation)	affected 10.0.0 < 10.0.18363.1556
Microsoft · Windows 10 Version 2004	affected 10.0.0 < 10.0.19041.982
Microsoft · Windows Server version 2004	affected 10.0.0 < 10.0.19041.982
Microsoft · Windows Server version 20H2	affected 10.0.0 < 10.0.19042.982
Microsoft · Windows 10 Version 1507	affected 10.0.0 < 10.0.10240.18931
Microsoft · Windows 10 Version 1607	affected 10.0.0 < 10.0.14393.4401
Microsoft · Windows Server 2016	affected 10.0.0 < 10.0.14393.4401
Microsoft · Windows Server 2016 (Server Core installation)	affected 10.0.0 < 10.0.14393.4401
Microsoft · Windows 7 Service Pack 1	affected 6.1.0 < 6.1.7601.24597 ; affected 6.1.0 < 6.1.7601.24598
Microsoft · Windows 8.1	affected 6.3.0 < 6.3.9600.20017
Microsoft · Windows Server 2008 Service Pack 2	affected 6.0.0 < 6.0.6003.21117
Microsoft · Windows Server 2008 Service Pack 2 (Server Core installation)	affected 6.0.0 < 6.0.6003.21117
Microsoft · Windows Server 2008 R2 Service Pack 1	affected 6.1.0 < 6.1.7601.24597 ; affected 6.1.0 < 6.1.7601.24598
Microsoft · Windows Server 2008 R2 Service Pack 1 (Server Core installation)	affected 6.0.0 < 6.1.7601.24597 ; affected 6.0.0 < 6.1.7601.24598
Microsoft · Windows Server 2012	affected 6.2.0 < 6.2.9200.23347

References

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD