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8.0

Windows Hyper-V Privilege Escalation Risk

CVE-2022-21901 · published 4 years ago
Summary

A security issue in Windows Hyper-V could allow an attacker to gain unauthorized access to sensitive data and elevate their privileges on a virtualized system. This affects Windows Hyper-V users who have virtual machines running on their systems. To protect yourself, ensure you have the latest Windows updates installed and consider disabling Hyper-V if it's not in use.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
microsoft windows_10 20h2
21h1
21h2
1607
1809
1909
cpe:2.3:o:microsoft:windows_10:-:*:*:*:*:*:x64:*
microsoft windows_11 All versions
cpe:2.3:o:microsoft:windows_11:-:*:*:*:*:*:x64:*
microsoft windows_8.1 All versions
cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:*:*:x64:*
microsoft windows_server 20h2
2022
cpe:2.3:o:microsoft:windows_server:20h2:*:*:*:*:*:*:*
microsoft windows_server_2012 r2
cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*
microsoft windows_server_2016 All versions
cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*
microsoft windows_server_2019 All versions
cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:*
Original advisory text
Windows Hyper-V Elevation of Privilege Vulnerability
Windows Hyper-V Elevation of Privilege Vulnerability
References
Fix within
Internet-facing 14 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit (estimated)
  • Gives an attacker full control (estimated)
Severity
8.0 High
Exploitation
<1% chance of attack within 30 days
Timeline
Published11 Jan 2022
Updated4 Nov 2026
First seen7 Mar 2026
Sources
CVE-2022-21901 · NVD
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