CVE-2021-43246
Windows Hyper-V Denial of Service Vulnerability
5.6 Medium
Windows Hyper-V Denial of Service Vulnerability
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- High
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
0.77%Up 0.3 points since Dec 16, 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-2021-43246- CVSS 3.1
- 5.6 Medium
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C - Updated
- 2026-11-02
EUVDEUVD-2021-30190
Windows Hyper-V Denial of Service Vulnerability
- Record
EUVD-2021-30190- CVSS 3.1
- 5.6 Medium
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-m9hw-3qvv-6hxr
Windows Hyper-V Denial of Service Vulnerability
Windows Hyper-V Denial of Service Vulnerability
- Record
GHSA-m9hw-3qvv-6hxr- CVSS 3.1
- 5.6 Medium
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H - Weakness
- CWE-400
- Updated
- 2026-11-02
NVD
Windows Hyper-V Denial of Service Vulnerability
- Record
CVE-2021-43246- CVSS 3.1
- 5.6 Medium
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H - CVSS 2.0
- 4.9 Medium
AV:L/AC:L/Au:N/C:N/I:N/A:C - Updated
- 2026-11-02
Affected products
- microsoft windows 10 version 1809
- microsoft windows 10 version 1909
- microsoft windows 10 version 2004
- microsoft windows 10 version 21h1
- microsoft windows 10 version 21h2
- microsoft windows 11 version 21h2
- microsoft windows server 2019
- microsoft windows server 2019 (server core installation)
- microsoft windows server 2022
- microsoft windows server version 2004
- microsoft windows server version 20h2
- microsoft windows 10
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History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-43246 is a medium vulnerability (CVSS 5.6) in Microsoft Windows 10 Version 1809, published December 15, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.77%, the 55th percentile. No source names a fixed version.