CVE-2026-32226
.NET Framework Denial of Service Vulnerability
Description
Concurrent execution using shared resource with improper synchronization ('race condition') in .NET Framework allows an unauthorized attacker to deny service over a network.
INFO
Published Date :
April 14, 2026, 6:17 p.m.
Last Modified :
June 17, 2026, 10:35 a.m.
Remotely Exploit :
No
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-32226
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 3.1 | MEDIUM | f38d906d-7342-40ea-92c1-6c4a2c6478c8 | ||||
| CVSS 3.1 | MEDIUM | [email protected] |
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-2026-32226.
| URL | Resource |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32226 | 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-2026-32226 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-2026-32226
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).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-32226 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-32226 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 [{'vendor': 'Microsoft', 'product': 'Microsoft .NET Framework 3.5', 'versions': [{'status': 'affected', 'version': '3.5.0', 'lessThan': '2.0.50727.8982 & 3.0.30729.8976', 'versionType': 'custom'}], 'platforms': ['Windows Server 2012', 'Windows Server 2012 (Server Core installation)', 'Windows Server 2012 R2', 'Windows Server 2012 R2 (Server Core installation)']}, {'vendor': 'Microsoft', 'product': 'Microsoft .NET Framework 3.5 AND 4.7.2', 'versions': [{'status': 'affected', 'version': '4.7.0', 'lessThan': '2.0.50727.9068 & 3.0.30729.9065 & 4.7.4141.0', 'versionType': 'custom'}], 'platforms': ['Windows 10 Version 1809 for 32-bit Systems', 'Windows 10 Version 1809 for ARM64-based Systems', 'Windows 10 Version 1809 for x64-based Systems']}, {'vendor': 'Microsoft', 'product': 'Microsoft .NET Framework 3.5 AND 4.8', 'versions': [{'status': 'affected', 'version': '4.8.0', 'lessThan': '2.0.50727.9068 & 3.0.30729.9065 & 4.8.4801.0', 'versionType': 'custom'}], 'platforms': ['Windows 10 Version 1809 for 32-bit Systems', 'Windows 10 Version 1809 for ARM64-based Systems', 'Windows 10 Version 1809 for x64-based Systems', 'Windows 10 Version 21H2 for 32-bit Systems', 'Windows 10 Version 21H2 for ARM64-based Systems', 'Windows 10 Version 21H2 for x64-based Systems', 'Windows 10 Version 22H2 for 32-bit Systems', 'Windows 10 Version 22H2 for ARM64-based Systems', 'Windows 10 Version 22H2 for x64-based Systems', 'Windows 11 version 21H2 for x64-based Systems', 'Windows Server 2022', 'Windows Server 2022 (Server Core installation)', 'Windows Server, version 20H2 (Server Core Installation)']}, {'vendor': 'Microsoft', 'product': 'Microsoft .NET Framework 3.5 AND 4.8.1', 'versions': [{'status': 'affected', 'version': '4.8.1', 'lessThan': '2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0', 'versionType': 'custom'}], 'platforms': ['Windows 10 Version 21H2 for 32-bit Systems', 'Windows 10 Version 21H2 for ARM64-based Systems', 'Windows 10 Version 21H2 for x64-based Systems', 'Windows 10 Version 22H2 for 32-bit Systems', 'Windows 10 Version 22H2 for ARM64-based Systems', 'Windows 10 Version 22H2 for x64-based Systems', 'Windows 11 Version 22H2 for ARM64-based Systems', 'Windows 11 Version 22H2 for x64-based Systems', 'Windows 11 Version 23H2 for ARM64-based Systems', 'Windows 11 Version 23H2 for x64-based Systems', 'Windows 11 Version 24H2 for ARM64-based Systems', 'Windows 11 Version 24H2 for x64-based Systems', 'Windows 11 Version 25H2 for ARM64-based Systems', 'Windows 11 Version 25H2 for x64-based Systems', 'Windows 11 Version 26H1 for ARM64-based Systems', 'Windows 11 version 26H1 for x64-based Systems', 'Windows Server 2022', 'Windows Server 2022 (Server Core installation)', 'Windows Server 2022, 23H2 Edition (Server Core installation)', 'Windows Server 2025', 'Windows Server 2025 (Server Core installation)']}, {'vendor': 'Microsoft', 'product': 'Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2', 'versions': [{'status': 'affected', 'version': '4.7.0', 'lessThan': '4.8.4801.0', 'versionType': 'custom'}], 'platforms': ['Windows Server 2012', 'Windows Server 2012 (Server Core installation)', 'Windows Server 2012 R2', 'Windows Server 2012 R2 (Server Core installation)']}, {'vendor': 'Microsoft', 'product': 'Microsoft .NET Framework 4.7.2', 'versions': [{'status': 'affected', 'version': '10.0.0.0', 'lessThan': '2.0.50727.9068 & 3.0.30729.9065 & 4.7.4141.0', 'versionType': 'custom'}], 'platforms': ['Windows 10 Version 1809 for 32-bit Systems', 'Windows 10 Version 1809 for ARM64-based Systems', 'Windows 10 Version 1809 for x64-based Systems']}, {'vendor': 'Microsoft', 'product': 'Microsoft .NET Framework 4.8', 'versions': [{'status': 'affected', 'version': '4.8.0', 'lessThan': '2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0', 'versionType': 'custom'}], 'platforms': ['Windows 10 Version 1607 for x64-based Systems', 'Windows 10 Version 22H2 for x64-based Systems', 'Windows 11 Version 22H2 for x64-based Systems', 'Windows Server 2012 (Server Core installation)', 'Windows Server 2012 R2', 'Windows Server 2012 R2 (Server Core installation)']}, {'vendor': 'Microsoft', 'product': 'Microsoft .NET Framework 4.8.1', 'versions': [{'status': 'affected', 'version': '4.8.0.0', 'lessThan': '2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0', 'versionType': 'custom'}], 'platforms': ['Windows Server 2022 (Server Core installation)']}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-32226', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-04-14T19:03:36.736622Z'} -
Initial Analysis by [email protected]
May. 06, 2026
Action Type Old Value New Value Added CPE Configuration AND OR *cpe:2.3:a:microsoft:.net_framework:4.7.2:*:*:*:*:*:*:* *cpe:2.3:a:microsoft:.net_framework:3.5:-:*:*:*:*:*:* OR cpe:2.3:o:microsoft:windows_10_1809:-:*:*:*:*:*:x64:* cpe:2.3:o:microsoft:windows_10_1809:-:*:*:*:*:*:arm64:* Added CPE Configuration AND OR *cpe:2.3:a:microsoft:.net_framework:4.8:*:*:*:*:*:*:* *cpe:2.3:a:microsoft:.net_framework:3.5:-:*:*:*:*:*:* OR cpe:2.3:o:microsoft:windows_10_1809:-:*:*:*:*:*:x64:* cpe:2.3:o:microsoft:windows_10_1809:-:*:*:*:*:*:arm64:* cpe:2.3:o:microsoft:windows_10_1809:-:*:*:*:*:*:x86:* cpe:2.3:o:microsoft:windows_server_20h2:-:*:*:*:*:*:x64:* Added CPE Configuration AND OR *cpe:2.3:a:microsoft:.net_framework:4.8:*:*:*:*:*:*:* OR cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:* cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:* cpe:2.3:o:microsoft:windows_10_1607:-:*:*:*:*:*:x64:* Added CPE Configuration AND OR *cpe:2.3:a:microsoft:.net_framework:3.5:-:*:*:*:*:*:* *cpe:2.3:a:microsoft:.net_framework:4.8.1:*:*:*:*:*:*:* OR cpe:2.3:o:microsoft:windows_11_26h1:-:*:*:*:*:*:arm64:* cpe:2.3:o:microsoft:windows_11_26h1:-:*:*:*:*:*:x64:* cpe:2.3:o:microsoft:windows_server_2025:-:*:*:*:*:*:x64:* Added Reference Type Microsoft Corporation: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32226 Types: Vendor Advisory -
New CVE Received by [email protected]
Apr. 14, 2026
Action Type Old Value New Value Added Description Concurrent execution using shared resource with improper synchronization ('race condition') in .NET Framework allows an unauthorized attacker to deny service over a network. Added CVSS V3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-362 Added Reference https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32226