CVE-2021-42284
Windows Hyper-V Denial of Service Vulnerability
6.8 Medium
Windows Hyper-V Denial of Service Vulnerability
Attack profile
How easy it is to exploit
- Attack vector
- Adjacent network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
3.76%Up 3.2 points since Nov 10, 2021
What each source reports
CVE List Score used
Windows Hyper-V Denial of Service Vulnerability
Windows Hyper-V Denial of Service Vulnerability
- Record
CVE-2021-42284- CVSS 3.1
- 6.8 Medium
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:P/RL:O/RC:C - Updated
- 2026-11-02
EUVDEUVD-2021-29259
Windows Hyper-V Denial of Service Vulnerability
- Record
EUVD-2021-29259- CVSS 3.1
- 6.8 Medium
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:P/RL:O/RC:C - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-3qx3-5cfw-9wfr
Windows Hyper-V Denial of Service Vulnerability
Windows Hyper-V Denial of Service Vulnerability
- Record
GHSA-3qx3-5cfw-9wfr- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-400
- Updated
- 2026-11-02
NVD
Windows Hyper-V Denial of Service Vulnerability
- Record
CVE-2021-42284- CVSS 3.1
- 6.8 Medium
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H - CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 7.1 High
AV:N/AC:M/Au:N/C:N/I:N/A:C - Updated
- 2026-11-02
Affected products
- microsoft windows 10 version 1507
- microsoft windows 10 version 1607
- microsoft windows 10 version 1809
- microsoft windows 10 version 1909
- microsoft windows 10 version 2004
- microsoft windows 10 version 21h1
- microsoft windows 11 version 21h2
- microsoft windows 8.1
- microsoft windows server 2012 r2
- microsoft windows server 2012 r2 (server core installation)
- microsoft windows server 2016
- microsoft windows server 2016 (server core installation)
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History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-42284 is a medium vulnerability (CVSS 6.8) in Microsoft Windows 10 Version 1507, published November 10, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.76%, the 90th percentile. No source names a fixed version.