CVE-2020-0993
A denial of service vulnerability exists in Windows DNS when it fails to properly handle queries, aka 'Windows DNS Denial of Service…
- Published
- Updated
- Reserved
- Assigned by
- microsoft
Description
A denial of service vulnerability exists in Windows DNS when it fails to properly handle queries, aka 'Windows DNS Denial of Service Vulnerability'.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 5.2% · top 7.4% of all CVEs (5 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.
Weakness
- Denial of Service
Affected products
- affected 10 Version 1803 for 32-bit Systems
- affected 10 Version 1803 for x64-based Systems
- affected 10 Version 1803 for ARM64-based Systems
- affected 10 Version 1809 for 32-bit Systems
- affected 10 Version 1809 for x64-based Systems
- affected 10 Version 1809 for ARM64-based Systems
- affected 10 Version 1709 for 32-bit Systems
- affected 10 Version 1709 for x64-based Systems
- affected 10 Version 1709 for ARM64-based Systems
- affected 10 for 32-bit Systems
- affected 10 for x64-based Systems
- affected 10 Version 1607 for 32-bit Systems
- affected 10 Version 1607 for x64-based Systems
- affected 7 for 32-bit Systems Service Pack 1
- affected 7 for x64-based Systems Service Pack 1
- affected 8.1 for 32-bit systems
- affected 8.1 for x64-based systems
- affected RT 8.1
- affected version 1803 (Core Installation)
- affected 2019
- affected 2019 (Core installation)
- affected 2016
- affected 2016 (Core installation)
- affected 2008 R2 for Itanium-Based Systems Service Pack 1
- affected 2008 R2 for x64-based Systems Service Pack 1
- affected 2008 R2 for x64-based Systems Service Pack 1 (Core installation)
- affected 2012
- affected 2012 (Core installation)
- affected 2012 R2
- affected 2012 R2 (Core installation)
Microsoft · Windows 10 Version 1909 for 32-bit Systems
- affected unspecified
Microsoft · Windows 10 Version 1909 for x64-based Systems
- affected unspecified
Microsoft · Windows 10 Version 1909 for ARM64-based Systems
- affected unspecified
Microsoft · Windows Server, version 1909 (Server Core installation)
- affected unspecified
Microsoft · Windows 10 Version 1903 for 32-bit Systems
- affected unspecified
Microsoft · Windows 10 Version 1903 for x64-based Systems
- affected unspecified
Microsoft · Windows 10 Version 1903 for ARM64-based Systems
- affected unspecified
Microsoft · Windows Server, version 1903 (Server Core installation)
- affected unspecified
References (1)
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0993 (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2020-0993)Record last updated .