CVE-2021-41338 json
Windows AppContainer Firewall Rules Security Feature Bypass Vulnerability
published 2021-10-13 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-28367
- cvss
- 5.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 3.3%
- EPSS 3.3% chance of exploitation in 30 days, percentile 88%
- public exploits
- 0
- none known
Summary
Windows AppContainer Firewall Rules Security Feature Bypass Vulnerability
Patch / fix
- Microsoft Windows 10 Version 1809 10.0.17763.2237
- Microsoft Windows Server 2019 10.0.17763.2237
- Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.2237
- Microsoft Windows 10 Version 1909 10.0.18363.1854
- Microsoft Windows 10 Version 21H1 10.0.19043.1288
- Microsoft Windows Server 2022 10.0.20348.288
- Microsoft Windows 10 Version 2004 10.0.19041.1288
- Microsoft Windows Server version 2004 10.0.19041.1288
- Microsoft Windows 10 Version 20H2 10.0.19042.1288
- Microsoft Windows Server version 20H2 10.0.19042.1288
- Microsoft Windows 11 version 21H2 10.0.22000.258
- Microsoft Windows 10 Version 1507 10.0.10240.19086
- Microsoft Windows 10 Version 1607 10.0.14393.4704
- Microsoft Windows Server 2016 10.0.14393.4704
- Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.4704
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 y ago
Exploit prediction
3.30% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.5 | 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 |
| CNA | 3.1 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
| CNA | 3.1 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N |
| NVD | 2.0 | 2.1 | AV:L/AC:L/Au:N/C:N/I:P/A:N |
Affected products
- Microsoft Windows 10 Version 1809
- Microsoft Windows Server 2019
- Microsoft Windows Server 2019 (Server Core installation)
- Microsoft Windows 10 Version 1909
- Microsoft Windows 10 Version 21H1
- Microsoft Windows Server 2022
- Microsoft Windows 10 Version 2004
- Microsoft Windows Server version 2004
- Microsoft Windows 10 Version 20H2
- Microsoft Windows Server version 20H2
- Microsoft Windows 11 version 21H2
- Microsoft Windows 10 Version 1507
- Microsoft Windows 10 Version 1607
- Microsoft Windows Server 2016
- Microsoft Windows Server 2016 (Server Core installation)
References
-
portal.msrc.microsoft.com
/en-US/security-guidance/advisory/CVE-2021-41338
patch, vendor-advisory
Sources
- CVE List CVE-2021-41338
- NVD CVE-2021-41338
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