CVE-2021-33765
Windows Installer Spoofing Vulnerability
- Published
- Updated
- Reserved
- Assigned by
- microsoft
Description
Windows Installer Spoofing Vulnerability
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| microsoftCNA (assigner) | 3.1 | Medium6.2 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C |
| NVDNVD · Modified | 3.1 | Medium6.2 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
- EPSS (exploitation in 30 days)
- 0.73% · top 46% of all CVEs (5 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.2.
Weakness
- Spoofing
Affected products
Microsoft · Windows 10 Version 1507
- affected 10.0.10240.0 – < 10.0.10240.19003
Microsoft · Windows 10 Version 1607
- affected 10.0.14393.0 – < 10.0.14393.4530
Microsoft · Windows 10 Version 1809
- affected 10.0.17763.0 – < 10.0.17763.2061
Microsoft · Windows 10 Version 1809
- affected 10.0.0 – < 10.0.17763.2061
Microsoft · Windows 10 Version 1909
- affected 10.0.0 – < 10.0.18363.1679
Microsoft · Windows 10 Version 2004
- affected 10.0.0 – < 10.0.19041.1110
Microsoft · Windows 10 Version 20H2
- affected 10.0.0 – < 10.0.19042.1110
Microsoft · Windows 10 Version 21H1
- affected 10.0.0 – < 10.0.19043.1110
- affected 6.1.0 – < 6.1.7601.25661
Microsoft · Windows 7 Service Pack 1
- affected 6.1.0 – < 6.1.7601.25661
- affected 6.3.0 – < 6.3.9600.20069
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 Installer Spoofing Vulnerability (opens in a new tab)vendor-advisorypatch
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-33765 (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-2021-33765)Record last updated .