CVE-2021-33758
Windows Hyper-V Denial of Service Vulnerability
Windows Hyper-V Denial of Service Vulnerability
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Windows Hyper-V Denial of Service Vulnerability
Windows Hyper-V Denial of Service Vulnerability
- Record
CVE-2021-33758- CVSS 3.1
- 7.7 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C - Updated
- 2026-11-02
EUVDEUVD-2021-20435
Windows Hyper-V Denial of Service Vulnerability
- Record
EUVD-2021-20435- CVSS 3.1
- 7.7 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-5h3p-vhgq-p526
Windows Hyper-V Denial of Service Vulnerability This CVE ID is unique from CVE-2021-33755.
Windows Hyper-V Denial of Service Vulnerability This CVE ID is unique from CVE-2021-33755.
- Record
GHSA-5h3p-vhgq-p526- CVSS 3.1
- 7.7 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H - Updated
- 2026-11-02
NVD
Windows Hyper-V Denial of Service Vulnerability
- Record
CVE-2021-33758- CVSS 3.1
- 7.7 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H - CVSS 2.0
- 4.0 Medium
AV:N/AC:L/Au:S/C:N/I:N/A:P - Updated
- 2026-11-02
Affected products
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-2021-33758 is a high vulnerability (CVSS 7.7) in Microsoft Windows 10 Version 1607, published July 14, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.87%, the 86th percentile. No source names a fixed version.