CVE-2018-8421
.NET Framework Remote Code Execution Vulnerability
CVE-2018-8421 is fixed in 69 products on 1 platform, first by KB4457131, released September 11, 2018. It is not reported as exploited. Patch Radar priority: Urgent.
Urgent
CVSS
n/a
Critical
Exploitation
None reported
Exploitation Less Likely
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.2908
98th percentile
<p>A remote code execution vulnerability exists when Microsoft .NET Framework processes input. An attacker who successfully exploited this vulnerability could take control of an affected system.</p> <p>To exploit the vulnerability, an attacker would need to be able to upload a specially crafted file to a web application.</p> <p>The security update addresses the vulnerability by correcting how .NET Framework processes input.</p>
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Microsoft | |||
| Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2 | KB4457054 | Sep 12, 2018 | |
| Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2 | KB4457043 | Sep 12, 2018 | |
| Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for Itanium-Based Systems Service Pack 2 | KB4457054 | Sep 12, 2018 | |
| Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for Itanium-Based Systems Service Pack 2 | KB4457043 | Sep 12, 2018 | |
| Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2 | KB4457054 | Sep 12, 2018 | |
| Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2 | KB4457043 | Sep 12, 2018 | |
| Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2 | KB4457054 | Sep 12, 2018 | |
| Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2 | KB4457043 | Sep 12, 2018 | |
| Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for Itanium-Based Systems Service Pack 2 | KB4457054 | Sep 12, 2018 | |
| Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for Itanium-Based Systems Service Pack 2 | KB4457043 | Sep 12, 2018 | |
| Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2 | KB4457054 | Sep 12, 2018 | |
| Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2 | KB4457043 | Sep 12, 2018 | |
| Microsoft .NET Framework 3.5 on Windows 10 Version 1607 for 32-bit Systems | 14393.2485 | KB4457131 | Sep 11, 2018 |
| Microsoft .NET Framework 3.5 on Windows 10 Version 1607 for x64-based Systems | 14393.2485 | KB4457131 | Sep 11, 2018 |
| Microsoft .NET Framework 3.5 on Windows 10 Version 1703 for 32-bit Systems | 15063.1324 | KB4457138 | Sep 11, 2018 |
| Microsoft .NET Framework 3.5 on Windows 10 Version 1703 for x64-based Systems | 15063.1324 | KB4457138 | Sep 11, 2018 |
| Microsoft .NET Framework 3.5 on Windows 10 Version 1709 for 32-bit Systems | 16299.665 | KB4457142 | Sep 11, 2018 |
| Microsoft .NET Framework 3.5 on Windows 10 Version 1709 for x64-based Systems | 16299.665 | KB4457142 | Sep 11, 2018 |
| Microsoft .NET Framework 3.5 on Windows 10 Version 1803 for 32-bit Systems | 17134.285 | KB4457128 | Sep 11, 2018 |
| Microsoft .NET Framework 3.5 on Windows 10 Version 1803 for x64-based Systems | 17134.285 | KB4457128 | Sep 11, 2018 |
| Microsoft .NET Framework 3.5 on Windows 10 for 32-bit Systems | 10240.17976 | KB4457132 | Sep 11, 2018 |
| Microsoft .NET Framework 3.5 on Windows 10 for x64-based Systems | 10240.17976 | KB4457132 | Sep 11, 2018 |
| Microsoft .NET Framework 3.5 on Windows 8.1 for 32-bit systems | KB4457045 | Sep 12, 2018 | |
| Microsoft .NET Framework 3.5 on Windows 8.1 for 32-bit systems | KB4457056 | Sep 12, 2018 | |
| Microsoft .NET Framework 3.5 on Windows 8.1 for x64-based systems | KB4457045 | Sep 12, 2018 | |
| Microsoft .NET Framework 3.5 on Windows 8.1 for x64-based systems | KB4457056 | Sep 12, 2018 | |
| Microsoft .NET Framework 3.5 on Windows Server 2012 | KB4457053 | Sep 12, 2018 | |
| Microsoft .NET Framework 3.5 on Windows Server 2012 | KB4457042 | Sep 12, 2018 | |
| Microsoft .NET Framework 3.5 on Windows Server 2012 (Server Core installation) | KB4457053 | Sep 12, 2018 | |
| Microsoft .NET Framework 3.5 on Windows Server 2012 (Server Core installation) | KB4457042 | Sep 12, 2018 | |
| Microsoft .NET Framework 3.5 on Windows Server 2012 R2 | KB4457045 | Sep 12, 2018 | |
| Microsoft .NET Framework 3.5 on Windows Server 2012 R2 | KB4457056 | Sep 12, 2018 | |
| Microsoft .NET Framework 3.5 on Windows Server 2012 R2 (Server Core installation) | KB4457045 | Sep 12, 2018 | |
| Microsoft .NET Framework 3.5 on Windows Server 2012 R2 (Server Core installation) | KB4457056 | Sep 12, 2018 | |
| Microsoft .NET Framework 3.5 on Windows Server 2016 | 14393.2485 | KB4457131 | Sep 11, 2018 |
| Microsoft .NET Framework 3.5 on Windows Server 2016 (Server Core installation) | 14393.2485 | KB4457131 | Sep 11, 2018 |
| Microsoft .NET Framework 3.5 on Windows Server, version 1709 (Server Core Installation) | 16299.665 | KB4457142 | Sep 11, 2018 |
| Microsoft .NET Framework 3.5 on Windows Server, version 1803 (Server Core Installation) | 17134.285 | KB4457128 | Sep 11, 2018 |
| Microsoft .NET Framework 3.5.1 on Windows 7 for 32-bit Systems Service Pack 1 | KB4457044 | Sep 12, 2018 | |
| Microsoft .NET Framework 3.5.1 on Windows 7 for 32-bit Systems Service Pack 1 | KB4457055 | Sep 12, 2018 | |
| Microsoft .NET Framework 3.5.1 on Windows 7 for x64-based Systems Service Pack 1 | KB4457044 | Sep 12, 2018 | |
| Microsoft .NET Framework 3.5.1 on Windows 7 for x64-based Systems Service Pack 1 | KB4457055 | Sep 12, 2018 | |
| Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 | KB4457044 | Sep 12, 2018 | |
| Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 | KB4457055 | Sep 12, 2018 | |
| Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 | KB4457044 | Sep 12, 2018 | |
| Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 | KB4457055 | Sep 12, 2018 | |
| Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | KB4457044 | Sep 12, 2018 | |
| Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | KB4457055 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.5.2 on Windows 7 for 32-bit Systems Service Pack 1 | KB4457038 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.5.2 on Windows 7 for 32-bit Systems Service Pack 1 | KB4457030 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.5.2 on Windows 7 for x64-based Systems Service Pack 1 | KB4457038 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.5.2 on Windows 7 for x64-based Systems Service Pack 1 | KB4457030 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.5.2 on Windows 8.1 for 32-bit systems | KB4457028 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.5.2 on Windows 8.1 for 32-bit systems | KB4457036 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.5.2 on Windows 8.1 for x64-based systems | KB4457028 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.5.2 on Windows 8.1 for x64-based systems | KB4457036 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.5.2 on Windows RT 8.1 | KB4457036 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.5.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 | KB4457038 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.5.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 | KB4457030 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.5.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | KB4457038 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.5.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | KB4457030 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.5.2 on Windows Server 2008 for 32-bit Systems Service Pack 2 | KB4457038 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.5.2 on Windows Server 2008 for 32-bit Systems Service Pack 2 | KB4457030 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.5.2 on Windows Server 2008 for x64-based Systems Service Pack 2 | KB4457038 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.5.2 on Windows Server 2008 for x64-based Systems Service Pack 2 | KB4457030 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.5.2 on Windows Server 2012 | KB4457029 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.5.2 on Windows Server 2012 | KB4457037 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.5.2 on Windows Server 2012 (Server Core installation) | KB4457029 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.5.2 on Windows Server 2012 (Server Core installation) | KB4457037 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.5.2 on Windows Server 2012 R2 | KB4457028 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.5.2 on Windows Server 2012 R2 | KB4457036 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.5.2 on Windows Server 2012 R2 (Server Core installation) | KB4457028 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.5.2 on Windows Server 2012 R2 (Server Core installation) | KB4457036 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.6 on Windows Server 2008 for 32-bit Systems Service Pack 2 | KB4457035 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.6 on Windows Server 2008 for 32-bit Systems Service Pack 2 | KB4457027 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.6 on Windows Server 2008 for x64-based Systems Service Pack 2 | KB4457035 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.6 on Windows Server 2008 for x64-based Systems Service Pack 2 | KB4457027 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607 for 32-bit Systems | 14393.2485 | KB4457131 | Sep 11, 2018 |
| Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607 for x64-based Systems | 14393.2485 | KB4457131 | Sep 11, 2018 |
| Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016 | 14393.2485 | KB4457131 | Sep 11, 2018 |
| Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016 (Server Core installation) | 14393.2485 | KB4457131 | Sep 11, 2018 |
| Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows 7 for 32-bit Systems Service Pack 1 | KB4457035 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows 7 for 32-bit Systems Service Pack 1 | KB4457027 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows 7 for x64-based Systems Service Pack 1 | KB4457035 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows 7 for x64-based Systems Service Pack 1 | KB4457027 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows 8.1 for 32-bit systems | KB4457034 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows 8.1 for 32-bit systems | KB4457026 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows 8.1 for x64-based systems | KB4457034 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows 8.1 for x64-based systems | KB4457026 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows RT 8.1 | KB4457034 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 | KB4457035 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 | KB4457027 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | KB4457035 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | KB4457027 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 | KB4457025 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 | KB4457033 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 (Server Core installation) | KB4457025 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 (Server Core installation) | KB4457033 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 R2 | KB4457034 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 R2 | KB4457026 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 R2 (Server Core installation) | KB4457034 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 R2 (Server Core installation) | KB4457026 | Sep 12, 2018 | |
| Microsoft .NET Framework 4.7.1/4.7.2 on Windows 10 Version 1709 for 32-bit Systems | 16299.665 | KB4457142 | Sep 11, 2018 |
| Microsoft .NET Framework 4.7.1/4.7.2 on Windows 10 Version 1709 for x64-based Systems | 16299.665 | KB4457142 | Sep 11, 2018 |
| Microsoft .NET Framework 4.7.1/4.7.2 on Windows Server, version 1709 (Server Core Installation) | 16299.665 | KB4457142 | Sep 11, 2018 |
| Microsoft .NET Framework 4.7.2 on Windows 10 Version 1803 for 32-bit Systems | 17134.285 | KB4457128 | Sep 11, 2018 |
| Microsoft .NET Framework 4.7.2 on Windows 10 Version 1803 for x64-based Systems | 17134.285 | KB4457128 | Sep 11, 2018 |
| Microsoft .NET Framework 4.7.2 on Windows Server, version 1803 (Server Core Installation) | 17134.285 | KB4457128 | Sep 11, 2018 |
| Microsoft .NET Framework 4.7/4.7.1/4.7.2 on Windows 10 Version 1703 for 32-bit Systems | 15063.1324 | KB4457138 | Sep 11, 2018 |
| Microsoft .NET Framework 4.7/4.7.1/4.7.2 on Windows 10 Version 1703 for x64-based Systems | 15063.1324 | KB4457138 | Sep 11, 2018 |
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