.NET Framework
CVE-2020-1046 — .NET Framework Remote Code Execution Vulnerability
Executive Summary
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. To exploit the vulnerability, an attacker would need to be able to upload a specially crafted file to a web application. The security update addresses the vulnerability by correcting how .NET Framework processes input.
Overview
7.8
CVSS HIGH
Critical
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
ATTACK VECTOR
Local
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
None
USER INTERACTION
Required
SCOPE
Unchanged
EPSS Score
0.03763
probability of exploitation in the next 30 days
0.88499 percentile - updated 2026-06-21
View on FIRST.org
Affected Products
33 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2 4570509 (Monthly Rollup) 4570503 (Security Only) Critical Remote Code Execution 4566520 Base: N/A Temporal: N/A Vector: N/A Maybe 4570503 Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2 4570509 (Monthly Rollup) 4570503 (Security Only) Critical Remote Code Execution 4566520 Base: N/A Temporal: N/A Vector: N/A Maybe 4570503 Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for 32-bit Systems | 4570505 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for ARM64-based Systems | 4570505 (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 | 4570505 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019 | 4570505 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019 (Server Core installation) | 4570505 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for 32-bit Systems | 4570505 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for x64-based Systems | 4570505 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019 | 4570505 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019 (Server Core installation) | 4570505 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.5 on Windows 10 for 32-bit Systems | 4571692 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 3.5 on Windows 10 for x64-based Systems | 4571692 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 3.5 on Windows 10 Version 1607 for 32-bit Systems | 4571694 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 3.5 on Windows 10 Version 1607 for x64-based Systems | 4571694 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 3.5 on Windows 10 Version 1709 for 32-bit Systems | 4571741 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 3.5 on Windows 10 Version 1709 for ARM64-based Systems | 4571741 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 3.5 on Windows 10 Version 1709 for x64-based Systems | 4571741 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 3.5 on Windows 10 Version 1803 for 32-bit Systems | 4571709 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 3.5 on Windows 10 Version 1803 for ARM64-based Systems | 4571709 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 3.5 on Windows 10 Version 1803 for x64-based Systems | 4571709 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 3.5 on Windows 10 Version 1903 for 32-bit Systems | 4569751 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.5 on Windows 10 Version 1903 for ARM64-based Systems | 4569751 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.5 on Windows 10 Version 1903 for x64-based Systems | 4569751 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.5 on Windows 10 Version 1909 for 32-bit Systems | 4569751 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.5 on Windows 10 Version 1909 for ARM64-based Systems | 4569751 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.5 on Windows 10 Version 1909 for x64-based Systems | 4569751 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.5 on Windows 10 Version 2004 for 32-bit Systems | 4569745 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.5 on Windows 10 Version 2004 for ARM64-based Systems | 4569745 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.5 on Windows 10 Version 2004 for x64-based Systems | 4569745 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.5 on Windows 8.1 for 32-bit systems 4570508 (Monthly Rollup) 4570502 (Security Only) Critical Remote Code Execution 4566519 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 3.5 on Windows 8.1 for x64-based systems 4570508 (Monthly Rollup) 4570502 (Security Only) Critical Remote Code Execution 4566519 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 3.5 on Windows Server 2012 4570507 (Monthly Rollup) 4570501 (Security Only) Critical Remote Code Execution 4566518 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 3.5 on Windows Server 2012 (Server Core installation) 4570507 (Monthly Rollup) 4570501 (Security Only) Critical Remote Code Execution 4566518 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 3.5 on Windows Server 2012 R2 4570508 (Monthly Rollup) 4570502 (Security Only) Critical Remote Code Execution 4566519 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 3.5 on Windows Server 2012 R2 (Server Core installation) 4570508 (Monthly Rollup) 4570502 (Security Only) Critical Remote Code Execution 4566519 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 3.5 on Windows Server 2016 | 4571694 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 3.5 on Windows Server 2016 (Server Core installation) | 4571694 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 3.5 on Windows Server, version 1903 (Server Core installation) | 4569751 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.5 on Windows Server, version 1909 (Server Core installation) | 4569751 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 3.5 on Windows Server, version 2004 (Server Core installation) | 4569745 (Security Update) |
Critical | Remote Code Execution | Maybe |
Patches
7 patches
| Article | Type | Restart |
|---|---|---|
4570505 |
Security Update | Maybe |
4571692 |
Security Update | Yes |
4571694 |
Security Update | Yes |
4571741 |
Security Update | Yes |
4571709 |
Security Update | Yes |
4569751 |
Security Update | Maybe |
4569745 |
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.
Acknowledgments
Oleksandr Mirosh (@olekmirosh) from Micro Focus Fortify
References
On This Page