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Fencer Vulns
critical 9.0

CVE-2022-21901 json

Windows Hyper-V Elevation of Privilege Vulnerability

published 2022-01-11 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-27057

cvss
9.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 61%
public exploits
0
none known

Summary

Windows Hyper-V Elevation of Privilege Vulnerability

Patch / fix

  • Microsoft Windows 10 Version 1809 10.0.17763.2452
  • Microsoft Windows Server 2019 10.0.17763.2452
  • Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.2452
  • Microsoft Windows 10 Version 1909 10.0.18363.2037
  • Microsoft Windows 10 Version 21H1 10.0.19043.1466
  • Microsoft Windows Server 2022 10.0.20348.469
  • Microsoft Windows Server version 20H2 10.0.19042.1466
  • Microsoft Windows 11 version 21H2 10.0.22000.434
  • Microsoft Windows 10 Version 21H2 10.0.19044.1466
  • Microsoft Windows 10 Version 1507 10.0.10240.19177
  • Microsoft Windows 10 Version 1607 10.0.14393.4886
  • Microsoft Windows Server 2016 10.0.14393.4886
  • Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.4886
  • Microsoft Windows 8.1 6.3.9600.20246
  • Microsoft Windows Server 2012 R2 6.3.9600.20246
  • Microsoft Windows Server 2012 R2 (Server Core installation) 6.3.9600.20246

Exploit prediction

0.95% chance of exploitation in the next 30 days, higher than 61% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 9.0 CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C
CNA 3.1 9.0 CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
NVD 3.1 8.0 CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.7 AV:A/AC:L/Au:S/C:C/I:C/A:C

Affected products

  • Microsoft Windows 10 Version 1809
  • Microsoft Windows Server 2019
  • Microsoft Windows Server 2019 (Server Core installation)
  • Microsoft Windows 10 Version 1909
  • Microsoft Windows 10 Version 21H1
  • Microsoft Windows Server 2022
  • Microsoft Windows Server version 20H2
  • Microsoft Windows 11 version 21H2
  • Microsoft Windows 10 Version 21H2
  • Microsoft Windows 10 Version 1507
  • Microsoft Windows 10 Version 1607
  • Microsoft Windows Server 2016
  • Microsoft Windows Server 2016 (Server Core installation)
  • Microsoft Windows 8.1
  • Microsoft Windows Server 2012 R2
  • Microsoft Windows Server 2012 R2 (Server Core installation)

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.