CVE-2021-41379
Windows Installer Elevation of Privilege Vulnerability
- Published
- Updated
- Reserved
- Assigned by
- microsoft
Description
Windows Installer Elevation of Privilege Vulnerability
Exploited in the wild
CISA lists this vulnerability in its Known Exploited Vulnerabilities catalog as Microsoft Windows Installer Privilege Escalation Vulnerability.
- Added
- 3 Mar 2022
- Fix due (US federal)
- 17 Mar 2022
- Used by ransomware
- Known
Apply updates per vendor instructions.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| microsoftCNA (assigner) | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C |
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 19.5% · top 2.6% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: active · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Weakness
Affected products
Microsoft · Windows 10 Version 1507
- affected 10.0.10240.0 – < 10.0.10240.19119
Microsoft · Windows 10 Version 1607
- affected 10.0.14393.0 – < 10.0.14393.4770
Microsoft · Windows 10 Version 1809
- affected 10.0.17763.0 – < 10.0.17763.2300
Microsoft · Windows 10 Version 1809
- affected 10.0.0 – < 10.0.17763.2300
Microsoft · Windows 10 Version 1909
- affected 10.0.0 – < 10.0.18363.1916
Microsoft · Windows 10 Version 2004
- affected 10.0.0 – < 10.0.19041.1348
Microsoft · Windows 10 Version 20H2
- affected 10.0.0 – < 10.0.19042.1348
Microsoft · Windows 10 Version 21H1
- affected 10.0.0 – < 10.0.19043.1348
Microsoft · Windows 11 version 21H2
- affected 10.0.22000.0 – < 10.0.22000.318
- affected 6.1.0 – < 6.1.7601.25769
Microsoft · Windows 7 Service Pack 1
- affected 6.1.0 – < 6.1.7601.25769
- affected 6.3.0 – < 6.3.9600.20174
Microsoft · Windows Server 2008 R2 Service Pack 1
- affected 6.1.7601.0 – < 6.1.7601.25769
Microsoft · Windows Server 2008 R2 Service Pack 1 (Server Core installation)
- affected 6.1.7601.0 – < 6.1.7601.25769
Microsoft · Windows Server 2008 Service Pack 2
- affected 6.0.6003.0 – < 6.0.6003.21282
Microsoft · Windows Server 2008 Service Pack 2 (Server Core installation)
- affected 6.0.6003.0 – < 6.0.6003.21282
Microsoft · Windows Server 2012
- affected 6.2.9200.0 – < 6.2.9200.23517
Microsoft · Windows Server 2012 (Server Core installation)
- affected 6.2.9200.0 – < 6.2.9200.23517
Microsoft · Windows Server 2012 R2
- affected 6.3.9600.0 – < 6.3.9600.20174
Microsoft · Windows Server 2012 R2 (Server Core installation)
- affected 6.3.9600.0 – < 6.3.9600.20174
Microsoft · Windows Server 2016
- affected 10.0.14393.0 – < 10.0.14393.4770
Microsoft · Windows Server 2016 (Server Core installation)
- affected 10.0.14393.0 – < 10.0.14393.4770
Microsoft · Windows Server 2019
- affected 10.0.17763.0 – < 10.0.17763.2300
Microsoft · Windows Server 2019 (Server Core installation)
- affected 10.0.17763.0 – < 10.0.17763.2300
Microsoft · Windows Server 2022
- affected 10.0.20348.0 – < 10.0.20348.350
Microsoft · Windows Server version 2004
- affected 10.0.0 – < 10.0.19041.1348
Microsoft · Windows Server version 20H2
- affected 10.0.0 – < 10.0.19042.1348
References (4)
- Windows Installer Elevation of Privilege Vulnerability (opens in a new tab)vendor-advisorypatch
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-41379 (opens in a new tab)x_refsource_MISCx_transferred
- https://www.zerodayinitiative.com/advisories/ZDI-21-1308/ (opens in a new tab)x_refsource_MISCx_transferred
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-41379 (opens in a new tab)government-resource
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)
- CISA KEV catalog (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-2021-41379)Record last updated .