.NET Framework
CVE-2020-0605 — .NET Framework Remote Code Execution Vulnerability
Executive Summary
A remote code execution vulnerability exists in .NET software when the software fails to check the source markup of a file. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the current user. If the current user is logged on with administrative user rights, an attacker could take control of the affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights. Exploitation of the vulnerability requires that a user open a specially crafted file with an affected version of .NET Framework. In an email attack scenario, an attacker could exploit the vulnerability by sending the specially crafted file to the user and convincing the user to open the file. The security update addresses the vulnerability by correcting how .NET Framework checks the source markup of a file.
Overview
Critical
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
EPSS Score
0.17906
probability of exploitation in the next 30 days
0.96802 percentile - updated 2026-06-20
View on FIRST.org
Affected Products
88 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| .NET Core 3.0 | Release Notes (Security Update) |
Critical | Remote Code Execution | Maybe |
| .NET Core 3.1 | Release Notes (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2 | 4535105 (Monthly Rollup) 4534979 (Security Only) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for Itanium-Based Systems Service Pack 2 | 4535105 (Monthly Rollup) 4534979 (Security Only) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2 | 4535105 (Monthly Rollup) 4534979 (Security Only) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607 for 32-bit Systems | 4556813 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607 for x64-based Systems | 4556813 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016 | 4556813 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016 (Server Core installation) | 4556813 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 3.5 AND 4.7.1/4.7.2 on Windows 10 Version 1709 for 32-bit Systems | 4556812 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 3.5 AND 4.7.1/4.7.2 on Windows 10 Version 1709 for x64-based Systems | 4556812 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1803 for 32-bit Systems | 4556807 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1803 for x64-based Systems | 4556807 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for 32-bit Systems | 4556441 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for x64-based Systems | 4556441 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019 | 4556441 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019 (Server Core installation) | 4556441 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server, version 1803 (Server Core Installation) | 4556807 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for 32-bit Systems | 4556441 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for x64-based Systems | 4556441 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1903 for 32-bit Systems | 4552931 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1903 for x64-based Systems | 4552931 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1909 for 32-bit Systems | 4552931 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1909 for x64-based Systems | 4552931 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019 | 4556441 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019 (Server Core installation) | 4556441 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows Server, version 1903 (Server Core installation) | 4552931 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows Server, version 1909 (Server Core installation) | 4552931 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.5 on Windows 8.1 for 32-bit systems | 4535104 (Monthly Rollup) 4534978 (Security Only) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.5 on Windows 8.1 for x64-based systems | 4535104 (Monthly Rollup) 4534978 (Security Only) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.5 on Windows Server 2012 | 4535103 (Monthly Rollup) 4534977 (Security Only) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.5 on Windows Server 2012 (Server Core installation) | 4535103 (Monthly Rollup) 4534977 (Security Only) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.5 on Windows Server 2012 R2 | 4535104 (Monthly Rollup) 4534978 (Security Only) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.5 on Windows Server 2012 R2 (Server Core installation) | 4535104 (Monthly Rollup) 4534978 (Security Only) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.5.1 on Windows 7 for 32-bit Systems Service Pack 1 | 4535102 (Monthly Rollup) 4534976 (Security Only) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.5.1 on Windows 7 for x64-based Systems Service Pack 1 | 4535102 (Monthly Rollup) 4534976 (Security Only) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 | 4535102 (Monthly Rollup) 4534976 (Security Only) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 | 4535102 (Monthly Rollup) 4534976 (Security Only) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | 4535102 (Monthly Rollup) 4534976 (Security Only) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 4.5.2 on Windows 7 for 32-bit Systems Service Pack 1 | 4556399 (Monthly Rollup) 4556403 (Security Only) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 4.5.2 on Windows 7 for x64-based Systems Service Pack 1 | 4556399 (Monthly Rollup) 4556403 (Security Only) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 4.5.2 on Windows 8.1 for 32-bit systems | 4556401 (Monthly Rollup) 4556405 (Security Only) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 4.5.2 on Windows 8.1 for x64-based systems | 4556401 (Monthly Rollup) 4556405 (Security Only) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 4.5.2 on Windows RT 8.1 | 4556401 (Monthly Rollup) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 4.5.2 on Windows Server 2008 for 32-bit Systems Service Pack 2 | 4556402 (Monthly Rollup) 4556406 (Security Only) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 4.5.2 on Windows Server 2008 for x64-based Systems Service Pack 2 | 4556402 (Monthly Rollup) 4556406 (Security Only) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 4.5.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 | 4556399 (Monthly Rollup) 4556403 (Security Only) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 4.5.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | 4556399 (Monthly Rollup) 4556403 (Security Only) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 4.5.2 on Windows Server 2012 | 4556400 (Monthly Rollup) 4556404 (Security Only) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 4.5.2 on Windows Server 2012 (Server Core installation) | 4556400 (Monthly Rollup) 4556404 (Security Only) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 4.5.2 on Windows Server 2012 R2 | 4556401 (Monthly Rollup) 4556405 (Security Only) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 4.5.2 on Windows Server 2012 R2 (Server Core installation) | 4556401 (Monthly Rollup) 4556405 (Security Only) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 4.6 on Windows Server 2008 for 32-bit Systems Service Pack 2 | 4556402 (Monthly Rollup) 4556406 (Security Only) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 4.6 on Windows Server 2008 for x64-based Systems Service Pack 2 | 4556402 (Monthly Rollup) 4556406 (Security Only) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 4.6/4.6.1/4.6.2 on Windows 10 for 32-bit Systems | 4556826 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 4.6/4.6.1/4.6.2 on Windows 10 for x64-based Systems | 4556826 (Security Update) |
Critical | Remote Code Execution | Yes |
| 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 | 4556399 (Monthly Rollup) 4556403 (Security Only) |
Critical | Remote Code Execution | Maybe |
| 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 | 4556399 (Monthly Rollup) 4556403 (Security Only) |
Critical | Remote Code Execution | Maybe |
| 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 | 4556401 (Monthly Rollup) 4556405 (Security Only) |
Critical | Remote Code Execution | Maybe |
| 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 | 4556401 (Monthly Rollup) 4556405 (Security Only) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows RT 8.1 | 4535104 (Monthly Rollup) |
Critical | Remote Code Execution | Maybe |
| 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 | 4556399 (Monthly Rollup) 4556403 (Security Only) |
Critical | Remote Code Execution | Maybe |
| 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) | 4556399 (Monthly Rollup) 4556403 (Security Only) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 | 4556400 (Monthly Rollup) 4556404 (Security Only) |
Critical | Remote Code Execution | Maybe |
| 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) | 4556400 (Monthly Rollup) 4556404 (Security Only) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 R2 | 4556401 (Monthly Rollup) 4556405 (Security Only) |
Critical | Remote Code Execution | Maybe |
| 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) | 4556401 (Monthly Rollup) 4556405 (Security Only) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for 32-bit Systems | 4552926 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for x64-based Systems | 4552926 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 4.8 on Windows 10 Version 1709 for 32-bit Systems | 4552928 (Security Update) |
Critical | Remote Code Execution | Unknown |
| Microsoft .NET Framework 4.8 on Windows 10 Version 1709 for x64-based Systems | 4552928 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 4.8 on Windows 10 Version 1803 for 32-bit Systems | 4552929 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 4.8 on Windows 10 Version 1803 for x64-based Systems | 4552929 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 4.8 on Windows 7 for 32-bit Systems Service Pack 1 | 4556399 (Monthly Rollup) 4556403 (Security Only) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 4.8 on Windows 7 for x64-based Systems Service Pack 1 | 4556399 (Monthly Rollup) 4556403 (Security Only) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 4.8 on Windows 8.1 for 32-bit systems | 4556401 (Monthly Rollup) 4556405 (Security Only) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 4.8 on Windows 8.1 for x64-based systems | 4556401 (Monthly Rollup) 4556405 (Security Only) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 4.8 on Windows RT 8.1 | 4556401 (Monthly Rollup) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 4.8 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 | 4556399 (Monthly Rollup) 4556403 (Security Only) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 4.8 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | 4556399 (Monthly Rollup) 4556403 (Security Only) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 4.8 on Windows Server 2012 | 4556400 (Monthly Rollup) 4556404 (Security Only) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 4.8 on Windows Server 2012 (Server Core installation) | 4556400 (Monthly Rollup) 4556404 (Security Only) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 4.8 on Windows Server 2012 R2 | 4556401 (Monthly Rollup) 4556405 (Security Only) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 4.8 on Windows Server 2012 R2 (Server Core installation) | 4556401 (Monthly Rollup) 4556405 (Security Only) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 4.8 on Windows Server 2016 | 4552926 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 4.8 on Windows Server 2016 (Server Core installation) | 4552926 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 4.8 on Windows Server, version 1803 (Server Core Installation) | 4552929 (Security Update) |
Critical | Remote Code Execution | Maybe |
| PowerShell 7.0 | Release Notes (Security Update) |
Critical | Remote Code Execution | Maybe |
Patches
20 patches
| Article | Type | Restart |
|---|---|---|
Release Notes |
Security Update | Maybe |
4535105 (Monthly Rollup) 4534979 |
Monthly Rollup | Maybe |
4556813 |
Security Update | Yes |
4556812 |
Security Update | Yes |
4556807 |
Security Update | Yes |
4556441 |
Security Update | Maybe |
4552931 |
Security Update | Maybe |
4535104 (Monthly Rollup) 4534978 |
Monthly Rollup | Maybe |
4535103 (Monthly Rollup) 4534977 |
Monthly Rollup | Maybe |
4535102 (Monthly Rollup) 4534976 |
Monthly Rollup | Maybe |
4556399 (Monthly Rollup) 4556403 |
Monthly Rollup | Maybe |
4556401 (Monthly Rollup) 4556405 |
Monthly Rollup | Maybe |
4556401 |
Monthly Rollup | Maybe |
4556402 (Monthly Rollup) 4556406 |
Monthly Rollup | Maybe |
4556400 (Monthly Rollup) 4556404 |
Monthly Rollup | Maybe |
4556826 |
Security Update | Yes |
4535104 |
Monthly Rollup | Maybe |
4552926 |
Security Update | Maybe |
4552928 |
Security Update | Unknown |
4552929 |
Security Update | Maybe |
Known Exploits
No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.
References
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