Vulnerability · Published Oct 13, 2021 · Assigned by microsoft
CVE-2021-41338Windows AppContainer Firewall Rules Security Feature Bypass Vulnerability
Medium 5.5
In plain English
A medium-severity security flaw in Windows 10 Version 1507 from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 3.3% (higher than 89% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.
Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)3.3%top 11.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack tooling1Public PoC
Official description
Windows AppContainer Firewall Rules Security Feature Bypass Vulnerability
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows 10 Version 1809 | 10.0.0 – before 10.0.17763.2237 |
| Microsoft | Windows Server 2019 | 10.0.0 – before 10.0.17763.2237 |
| Microsoft | Windows Server 2019 (Server Core installation) | 10.0.0 – before 10.0.17763.2237 |
| Microsoft | Windows 10 Version 1909 | 10.0.0 – before 10.0.18363.1854 |
| Microsoft | Windows 10 Version 21H1 | 10.0.0 – before 10.0.19043.1288 |
| Microsoft | Windows Server 2022 | 10.0.0 – before 10.0.20348.288 |
| Microsoft | Windows 10 Version 2004 | 10.0.0 – before 10.0.19041.1288 |
| Microsoft | Windows Server version 2004 | 10.0.0 – before 10.0.19041.1288 |
| Microsoft | Windows 10 Version 20H2 | 10.0.0 – before 10.0.19042.1288 |
| Microsoft | Windows Server version 20H2 | 10.0.0 – before 10.0.19042.1288 |
| Microsoft | Windows 11 version 21H2 | 10.0.0 – before 10.0.22000.258 |
| Microsoft | Windows 10 Version 1507 | 10.0.0 – before 10.0.10240.19086 |
| Microsoft | Windows 10 Version 1607 | 10.0.0 – before 10.0.14393.4704 |
| Microsoft | Windows Server 2016 | 10.0.0 – before 10.0.14393.4704 |
| Microsoft | Windows Server 2016 (Server Core installation) | 10.0.0 – before 10.0.14393.4704 |