CVE-2021-33745
Windows DNS Server Denial of Service Vulnerability
- Published
- Updated
- Reserved
- Assigned by
- microsoft
Description
Windows DNS Server Denial of Service Vulnerability
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| microsoftCNA (assigner) | 3.1 | Medium6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C |
| 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)
- 2.9% · top 13% of all CVEs (6 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
Microsoft · Windows Server 2008 R2 Service Pack 1
- affected 6.1.7601.0 – < 6.1.7601.25661
Microsoft · Windows Server 2008 R2 Service Pack 1 (Server Core installation)
- affected 6.1.7601.0 – < 6.1.7601.25661
Microsoft · Windows Server 2008 Service Pack 2
- affected 6.0.6003.0 – < 6.0.6003.21167
Microsoft · Windows Server 2008 Service Pack 2 (Server Core installation)
- affected 6.0.6003.0 – < 6.0.6003.21167
Microsoft · Windows Server 2012
- affected 6.2.9200.0 – < 6.2.9200.23409
Microsoft · Windows Server 2012 (Server Core installation)
- affected 6.2.9200.0 – < 6.2.9200.23409
Microsoft · Windows Server 2012 R2
- affected 6.3.9600.0 – < 6.3.9600.20069
Microsoft · Windows Server 2012 R2 (Server Core installation)
- affected 6.3.9600.0 – < 6.3.9600.20069
Microsoft · Windows Server 2016
- affected 10.0.14393.0 – < 10.0.14393.4530
Microsoft · Windows Server 2016 (Server Core installation)
- affected 10.0.14393.0 – < 10.0.14393.4530
Microsoft · Windows Server 2019
- affected 10.0.17763.0 – < 10.0.17763.2061
Microsoft · Windows Server 2019 (Server Core installation)
- affected 10.0.17763.0 – < 10.0.17763.2061
Microsoft · Windows Server version 2004
- affected 10.0.0 – < 10.0.19041.1110
Microsoft · Windows Server version 20H2
- affected 10.0.0 – < 10.0.19042.1110
References (2)
- Windows DNS Server Denial of Service Vulnerability (opens in a new tab)vendor-advisorypatch
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-33745 (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-2021-33745)Record last updated .