Description
Windows AppContainer Firewall Rules Security Feature Bypass Vulnerability
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Microsoft | Windows 10 Version 1809 | 10.0.0 – < 10.0.17763.2237 | 10.0.17763.2237 |
| Microsoft | Windows Server 2019 | 10.0.0 – < 10.0.17763.2237 | 10.0.17763.2237 |
| Microsoft | Windows Server 2019 (Server Core installation) | 10.0.0 – < 10.0.17763.2237 | 10.0.17763.2237 |
| Microsoft | Windows 10 Version 1909 | 10.0.0 – < 10.0.18363.1854 | 10.0.18363.1854 |
| Microsoft | Windows 10 Version 21H1 | 10.0.0 – < 10.0.19043.1288 | 10.0.19043.1288 |
| Microsoft | Windows Server 2022 | 10.0.0 – < 10.0.20348.288 | 10.0.20348.288 |
| Microsoft | Windows 10 Version 2004 | 10.0.0 – < 10.0.19041.1288 | 10.0.19041.1288 |
| Microsoft | Windows Server version 2004 | 10.0.0 – < 10.0.19041.1288 | 10.0.19041.1288 |
| Microsoft | Windows 10 Version 20H2 | 10.0.0 – < 10.0.19042.1288 | 10.0.19042.1288 |
| Microsoft | Windows Server version 20H2 | 10.0.0 – < 10.0.19042.1288 | 10.0.19042.1288 |
| Microsoft | Windows 11 version 21H2 | 10.0.0 – < 10.0.22000.258 | 10.0.22000.258 |
| Microsoft | Windows 10 Version 1507 | 10.0.0 – < 10.0.10240.19086 | 10.0.10240.19086 |
| Microsoft | Windows 10 Version 1607 | 10.0.0 – < 10.0.14393.4704 | 10.0.14393.4704 |
| Microsoft | Windows Server 2016 | 10.0.0 – < 10.0.14393.4704 | 10.0.14393.4704 |
| Microsoft | Windows Server 2016 (Server Core installation) | 10.0.0 – < 10.0.14393.4704 | 10.0.14393.4704 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 1 repository
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Mario-Kart-Felix/firewall-cve ★ 1 · Mar 22, 2022
Windows AppContainer Firewall Rules Security Feature Bypass Vulnerability CVE-2021-41338 Security Vulnerability Released: Oct 12, 2021 Assigning CNA: Microsoft MITRE CVE-2021-41338 CVSS:3.1 5.5 / 5.0…
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.