CVE-2021-41338
Windows AppContainer Firewall Rules Security Feature Bypass Vulnerability
- Published
- Updated
- Reserved
- Assigned by
- microsoft
Description
Windows AppContainer Firewall Rules Security Feature Bypass Vulnerability
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:H/I:N/A:N/E:P/RL:O/RC:C |
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
- EPSS (exploitation in 30 days)
- 3.3% · top 11% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Weakness
- Security Feature Bypass
Affected products
Microsoft · Windows 10 Version 1809
- affected 10.0.0 – < 10.0.17763.2237
Microsoft · Windows Server 2019
- affected 10.0.0 – < 10.0.17763.2237
Microsoft · Windows Server 2019 (Server Core installation)
- affected 10.0.0 – < 10.0.17763.2237
Microsoft · Windows 10 Version 1909
- affected 10.0.0 – < 10.0.18363.1854
Microsoft · Windows 10 Version 21H1
- affected 10.0.0 – < 10.0.19043.1288
Microsoft · Windows Server 2022
- affected 10.0.0 – < 10.0.20348.288
Microsoft · Windows 10 Version 2004
- affected 10.0.0 – < 10.0.19041.1288
Microsoft · Windows Server version 2004
- affected 10.0.0 – < 10.0.19041.1288
Microsoft · Windows 10 Version 20H2
- affected 10.0.0 – < 10.0.19042.1288
Microsoft · Windows Server version 20H2
- affected 10.0.0 – < 10.0.19042.1288
Microsoft · Windows 11 version 21H2
- affected 10.0.0 – < 10.0.22000.258
Microsoft · Windows 10 Version 1507
- affected 10.0.0 – < 10.0.10240.19086
Microsoft · Windows 10 Version 1607
- affected 10.0.0 – < 10.0.14393.4704
Microsoft · Windows Server 2016
- affected 10.0.0 – < 10.0.14393.4704
Microsoft · Windows Server 2016 (Server Core installation)
- affected 10.0.0 – < 10.0.14393.4704
References (1)
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-41338 (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-2021-41338)Record last updated .