CVE-2021-41338
Windows AppContainer Firewall Rules Security Feature Bypass Vulnerability
Description
Windows AppContainer Firewall Rules Security Feature Bypass Vulnerability
INFO
Published Date :
Oct. 13, 2021, 1:15 a.m.
Last Modified :
June 17, 2026, 4:08 a.m.
Remotely Exploit :
No
Source :
[email protected]
Affected Products
The following products are affected by CVE-2021-41338
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 2.0 | LOW | [email protected] | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Apply the latest security updates.
- Reboot the system if prompted by the update process.
Public PoC/Exploit Available at Github
CVE-2021-41338 has a 5 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-41338.
| URL | Resource |
|---|---|
| https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-41338 | Patch Vendor Advisory |
| https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-41338 | Patch Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-41338 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-41338
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
All CVE - PoC in GitHub
poc proofofconcept tester allcve cvegithub cvenew cvepoc cveupdate
None
None
None
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 Attack Vector Local Attack Complexity Low Privileges Required Low User Interaction None Scope Unchanged Confidentiality High Integrity None Availability None Exploit Code Maturity Proof-of-Concept Remediation Level Official Fix Report Confidence Confirmed Please see Common Vulnerability Scoring System for more information on the definition of these metrics. Exploitability The following table provides an exploitability assessment for this vulnerability at the time of original publication. Yes No Exploitation Less Likely
Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-41338 vulnerability anywhere in the article.
-
TheCyberThrone
Microsoft Patch Tuesday – October 2024
Microsoft patched 117 CVEs in October 2024 Patch Tuesday release, with three rated critical, 113 rated important and one rated moderate.27 Elevation of Privilege vulnerabilities7 Security Feature Bypa ... Read more
The following table lists the changes that have been made to the
CVE-2021-41338 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'cpes': ['cpe:2.3:o:microsoft:windows_10_1809:10.0.17763.2237:*:*:*:*:*:x86:*', 'cpe:2.3:o:microsoft:windows_10_1809:10.0.17763.2237:*:*:*:*:*:x64:*', 'cpe:2.3:o:microsoft:windows_10_1809:10.0.17763.2237:*:*:*:*:*:arm64:*'], 'vendor': 'Microsoft', 'product': 'Windows 10 Version 1809', 'versions': [{'status': 'affected', 'version': '10.0.0', 'lessThan': '10.0.17763.2237', 'versionType': 'custom'}], 'platforms': ['32-bit Systems', 'x64-based Systems', 'ARM64-based Systems']}, {'cpes': ['cpe:2.3:o:microsoft:windows_server_2019:10.0.17763.2237:*:*:*:*:*:*:*'], 'vendor': 'Microsoft', 'product': 'Windows Server 2019', 'versions': [{'status': 'affected', 'version': '10.0.0', 'lessThan': '10.0.17763.2237', 'versionType': 'custom'}], 'platforms': ['x64-based Systems']}, {'cpes': ['cpe:2.3:o:microsoft:windows_server_2019:10.0.17763.2237:*:*:*:*:*:*:*'], 'vendor': 'Microsoft', 'product': 'Windows Server 2019 (Server Core installation)', 'versions': [{'status': 'affected', 'version': '10.0.0', 'lessThan': '10.0.17763.2237', 'versionType': 'custom'}], 'platforms': ['x64-based Systems']}, {'cpes': ['cpe:2.3:o:microsoft:windows_10_1909:10.0.18363.1854:*:*:*:*:*:x86:*', 'cpe:2.3:o:microsoft:windows_10_1909:10.0.18363.1854:*:*:*:*:*:x64:*', 'cpe:2.3:o:microsoft:windows_10_1809:10.0.18363.1854:*:*:*:*:*:x64:*'], 'vendor': 'Microsoft', 'product': 'Windows 10 Version 1909', 'versions': [{'status': 'affected', 'version': '10.0.0', 'lessThan': '10.0.18363.1854', 'versionType': 'custom'}], 'platforms': ['32-bit Systems', 'x64-based Systems', 'ARM64-based Systems']}, {'cpes': ['cpe:2.3:o:microsoft:windows_10_21H1:10.0.19043.1288:*:*:*:*:*:x64:*', 'cpe:2.3:o:microsoft:windows_10_21H1:10.0.19043.1288:*:*:*:*:*:arm64:*', 'cpe:2.3:o:microsoft:windows_10_21H1:10.0.19043.1288:*:*:*:*:*:x86:*'], 'vendor': 'Microsoft', 'product': 'Windows 10 Version 21H1', 'versions': [{'status': 'affected', 'version': '10.0.0', 'lessThan': '10.0.19043.1288', 'versionType': 'custom'}], 'platforms': ['x64-based Systems', 'ARM64-based Systems', '32-bit Systems']}, {'cpes': ['cpe:2.3:o:microsoft:windows_server_2022:10.0.20348.288:*:*:*:*:*:*:*'], 'vendor': 'Microsoft', 'product': 'Windows Server 2022', 'versions': [{'status': 'affected', 'version': '10.0.0', 'lessThan': '10.0.20348.288', 'versionType': 'custom'}], 'platforms': ['x64-based Systems']}, {'cpes': ['cpe:2.3:o:microsoft:windows_10_1809:10.0.19041.1288:*:*:*:*:*:x64:*'], 'vendor': 'Microsoft', 'product': 'Windows 10 Version 2004', 'versions': [{'status': 'affected', 'version': '10.0.0', 'lessThan': '10.0.19041.1288', 'versionType': 'custom'}], 'platforms': ['32-bit Systems', 'ARM64-based Systems', 'x64-based Systems']}, {'cpes': ['cpe:2.3:o:microsoft:windows_server_2004:10.0.19041.1288:*:*:*:*:*:*:*'], 'vendor': 'Microsoft', 'product': 'Windows Server version 2004', 'versions': [{'status': 'affected', 'version': '10.0.0', 'lessThan': '10.0.19041.1288', 'versionType': 'custom'}], 'platforms': ['x64-based Systems']}, {'cpes': ['cpe:2.3:o:microsoft:windows_10_20H2:10.0.19042.1288:*:*:*:*:*:x86:*', 'cpe:2.3:o:microsoft:windows_10_20H2:10.0.19042.1288:*:*:*:*:*:arm64:*'], 'vendor': 'Microsoft', 'product': 'Windows 10 Version 20H2', 'versions': [{'status': 'affected', 'version': '10.0.0', 'lessThan': '10.0.19042.1288', 'versionType': 'custom'}], 'platforms': ['32-bit Systems', 'ARM64-based Systems']}, {'cpes': ['cpe:2.3:o:microsoft:windows_server_20H2:10.0.19042.1288:*:*:*:*:*:*:*'], 'vendor': 'Microsoft', 'product': 'Windows Server version 20H2', 'versions': [{'status': 'affected', 'version': '10.0.0', 'lessThan': '10.0.19042.1288', 'versionType': 'custom'}], 'platforms': ['x64-based Systems']}, {'cpes': ['cpe:2.3:o:microsoft:windows_11_21H2:10.0.22000.258:*:*:*:*:*:x64:*', 'cpe:2.3:o:microsoft:windows_11_21H2:10.0.22000.258:*:*:*:*:*:arm64:*'], 'vendor': 'Microsoft', 'product': 'Windows 11 version 21H2', 'versions': [{'status': 'affected', 'version': '10.0.0', 'lessThan': '10.0.22000.258', 'versionType': 'custom'}], 'platforms': ['x64-based Systems', 'ARM64-based Systems']}, {'cpes': ['cpe:2.3:o:microsoft:windows_10_1507:10.0.10240.19086:*:*:*:*:*:x86:*', 'cpe:2.3:o:microsoft:windows_10_1507:10.0.10240.19086:*:*:*:*:*:x64:*'], 'vendor': 'Microsoft', 'product': 'Windows 10 Version 1507', 'versions': [{'status': 'affected', 'version': '10.0.0', 'lessThan': '10.0.10240.19086', 'versionType': 'custom'}], 'platforms': ['32-bit Systems', 'x64-based Systems']}, {'cpes': ['cpe:2.3:o:microsoft:windows_10_1607:10.0.14393.4704:*:*:*:*:*:x86:*', 'cpe:2.3:o:microsoft:windows_10_1607:10.0.14393.4704:*:*:*:*:*:x64:*'], 'vendor': 'Microsoft', 'product': 'Windows 10 Version 1607', 'versions': [{'status': 'affected', 'version': '10.0.0', 'lessThan': '10.0.14393.4704', 'versionType': 'custom'}], 'platforms': ['32-bit Systems', 'x64-based Systems']}, {'cpes': ['cpe:2.3:o:microsoft:windows_server_2016:10.0.14393.4704:*:*:*:*:*:*:*'], 'vendor': 'Microsoft', 'product': 'Windows Server 2016', 'versions': [{'status': 'affected', 'version': '10.0.0', 'lessThan': '10.0.14393.4704', 'versionType': 'custom'}], 'platforms': ['x64-based Systems']}, {'cpes': ['cpe:2.3:o:microsoft:windows_server_2016:10.0.14393.4704:*:*:*:*:*:*:*'], 'vendor': 'Microsoft', 'product': 'Windows Server 2016 (Server Core installation)', 'versions': [{'status': 'affected', 'version': '10.0.0', 'lessThan': '10.0.14393.4704', 'versionType': 'custom'}], 'platforms': ['x64-based Systems']}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2021-41338', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2024-06-04T15:05:35.188081Z'} -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-41338 -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Aug. 01, 2023
Action Type Old Value New Value Added CVSS V3.1 Microsoft Corporation AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N -
Initial Analysis by [email protected]
Oct. 19, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:L/AC:L/Au:N/C:N/I:P/A:N) Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N Changed Reference Type https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-41338 No Types Assigned https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-41338 Patch, Vendor Advisory Added CWE NIST NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:o:microsoft:windows_10:-:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_10:20h2:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_10:21h1:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_10:1607:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_10:1809:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_10:1909:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_10:2004:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_11:-:*:*:*:*:*:arm64:* *cpe:2.3:o:microsoft:windows_11:-:*:*:*:*:*:x64:* *cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2016:20h2:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2016:2004:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2022:-:*:*:*:*:*:*:*