CVE-2021-42274 json
Windows Hyper-V Discrete Device Assignment (DDA) Denial of Service Vulnerability
published 2021-11-10 4 y ago modified 2026-08-19 2 mo ago also EUVD-2021-29250
- cvss
- 6.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 53%
- public exploits
- 0
- none known
Summary
Windows Hyper-V Discrete Device Assignment (DDA) Denial of Service Vulnerability
Patch / fix
- Microsoft Windows 10 Version 1607 10.0.14393.4770
- Microsoft Windows 10 Version 1809 10.0.17763.2300
- Microsoft Windows 10 Version 2004 10.0.19041.1348
- Microsoft Windows 10 Version 21H1 10.0.19043.1348
- Microsoft Windows 11 version 21H2 10.0.22000.318
- Microsoft Windows Server 2016 10.0.14393.4770
- Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.4770
- Microsoft Windows Server 2019 10.0.17763.2300
- Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.2300
- Microsoft Windows Server 2022 10.0.20348.350
- Microsoft Windows Server version 2004 10.0.19041.1348
- Microsoft Windows Server version 20H2 10.0.19041.1348
Exploit prediction
0.69% chance of exploitation in the next 30 days, higher than 53% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.8 | CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C |
| CNA | 3.1 | 6.8 | CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H |
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H |
| NVD | 2.0 | 2.1 | AV:L/AC:L/Au:N/C:N/I:N/A:P |
Affected products
- Microsoft Windows 10 Version 1607
- Microsoft Windows 10 Version 1809
- Microsoft Windows 10 Version 2004
- Microsoft Windows 10 Version 21H1
- Microsoft Windows 11 version 21H2
- Microsoft Windows Server 2016
- Microsoft Windows Server 2016 (Server Core installation)
- 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
References
-
msrc.microsoft.com
/update-guide/vulnerability/CVE-2021-42274
vendor-advisory, patch
-
portal.msrc.microsoft.com
/en-US/security-guidance/advisory/CVE-2021-42274
patch, vendor-advisory
Sources
- CVE List CVE-2021-42274
- NVD CVE-2021-42274
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