CVE-2020-0646Microsoft .NET Framework Remote Code Execution Vulnerability

A remote code execution vulnerability exists when the Microsoft .NET Framework fails to validate input properly, aka '.NET Framework Remote Code Execution Injection Vulnerability'.

9.8 CRITICALEPSS 99.22%⚡ Known Exploited (CISA KEV)NVD: Analyzed

Last updated: 2026-06-17 02:46 UTC

OverviewCVSS details

9.8CRITICALCVSS 3.1

Score source: NVD
NVD status: Analyzed
Published: Jan 14, 2020
Assigner: microsoft

Affected

Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 (Microsoft)

Versions: Windows 7 for 32-bit Systems Service Pack 1 · Windows 7 for x64-based Systems Service Pack 1

+51 more products →

Exploitation

Public exploit: Yes · 1 reference
CISA KEV: Listed · Nov 3, 2021
KEV due date: May 3, 2022
Ransomware use: Unknown
SSVC: Exploitation active · Automatable yes · Impact total

EPSS · FIRST, scored Nov 7

99.22%chance of exploitation in 30 days

Higher than 99.93% of CVEs

CVSS 3.1 · NVD

9.8Critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

CVSS 2.0 · NVD

10.0High

AV:N/AC:L/Au:N/C:C/I:C/A:C

Attack vector: Network
Attack complexity: Low
Authentication: None
Confidentiality impact: Complete
Integrity impact: Complete
Availability impact: Complete

NVD status: Analyzed

Overview Affected Products References

NVD CVE.org

Overview

Severity

Score	Severity	Version	Vector String
9.8	CRITICAL	3.1NVD	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
10.0	HIGH	2.0NVD	AV:N/AC:L/Au:N/C:C/I:C/A:C

CISA required action

⚡ Known exploited · remediation due May 3, 2022

Apply updates per vendor instructions.

Details

CVE ID: CVE-2020-0646
Status: Analyzed
Assigner (CNA): microsoft
Published: Jan 14, 2020
Last modified: 2026-06-17 02:46 UTC
Weaknesses: CWE-91

Affected Products

As published by the CNA in the CVE record.

MicrosoftMicrosoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.211 version ranges

Windows 7 for 32-bit Systems Service Pack 1
Windows 7 for x64-based Systems Service Pack 1
Windows 8.1 for 32-bit systems
Windows 8.1 for x64-based systems
Windows RT 8.1
Windows Server 2008 R2 for x64-based Systems Service Pack 1
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
Windows Server 2012
Windows Server 2012 (Server Core installation)
Windows Server 2012 R2
Windows Server 2012 R2 (Server Core installation)

MicrosoftMicrosoft .NET Framework 4.6.2/4.7/4.7.1/4.7.21 version range

Windows 10 Version 1607 for 32-bit Systems

MicrosoftMicrosoft .NET Framework 4.8 on Windows 10 Version 1803 for 32-bit Systems0 version ranges

No version detail published.

MicrosoftMicrosoft .NET Framework 4.8 on Windows 10 Version 1803 for x64-based Systems0 version ranges

No version detail published.

MicrosoftMicrosoft .NET Framework 4.8 on Windows Server, version 1803 (Server Core Installation)0 version ranges

No version detail published.

MicrosoftMicrosoft .NET Framework 4.8 on Windows 10 Version 1709 for 32-bit Systems0 version ranges

No version detail published.

MicrosoftMicrosoft .NET Framework 4.8 on Windows 10 Version 1709 for x64-based Systems0 version ranges

No version detail published.

MicrosoftMicrosoft .NET Framework 4.8 on Windows 10 Version 1607 for 32-bit Systems0 version ranges

No version detail published.

MicrosoftMicrosoft .NET Framework 4.8 on Windows 10 Version 1607 for x64-based Systems0 version ranges

No version detail published.

MicrosoftMicrosoft .NET Framework 4.8 on Windows Server 20160 version ranges

No version detail published.

MicrosoftMicrosoft .NET Framework 4.8 on Windows Server 2016 (Server Core installation)0 version ranges

No version detail published.

MicrosoftMicrosoft .NET Framework 4.8 on Windows 7 for 32-bit Systems Service Pack 10 version ranges

No version detail published.

MicrosoftMicrosoft .NET Framework 4.8 on Windows 7 for x64-based Systems Service Pack 10 version ranges

No version detail published.

MicrosoftMicrosoft .NET Framework 4.8 on Windows 8.1 for 32-bit systems0 version ranges

No version detail published.

MicrosoftMicrosoft .NET Framework 4.8 on Windows 8.1 for x64-based systems0 version ranges

No version detail published.

MicrosoftMicrosoft .NET Framework 4.8 on Windows RT 8.10 version ranges

No version detail published.

MicrosoftMicrosoft .NET Framework 4.8 on Windows Server 2008 R2 for x64-based Systems Service Pack 10 version ranges

No version detail published.

MicrosoftMicrosoft .NET Framework 4.8 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)0 version ranges

No version detail published.

MicrosoftMicrosoft .NET Framework 4.8 on Windows Server 20120 version ranges

No version detail published.

MicrosoftMicrosoft .NET Framework 4.8 on Windows Server 2012 (Server Core installation)0 version ranges

No version detail published.

MicrosoftMicrosoft .NET Framework 4.8 on Windows Server 2012 R20 version ranges

No version detail published.

MicrosoftMicrosoft .NET Framework 4.8 on Windows Server 2012 R2 (Server Core installation)0 version ranges

No version detail published.

MicrosoftMicrosoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for 32-bit Systems0 version ranges

No version detail published.

MicrosoftMicrosoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for x64-based Systems0 version ranges

No version detail published.

MicrosoftMicrosoft .NET Framework 3.5 AND 4.8 on Windows Server 20190 version ranges

No version detail published.

MicrosoftMicrosoft .NET Framework 3.5 AND 4.8 on Windows Server 2019 (Server Core installation)0 version ranges

No version detail published.

MicrosoftMicrosoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1903 for 32-bit Systems0 version ranges

No version detail published.

MicrosoftMicrosoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1903 for x64-based Systems0 version ranges

No version detail published.

MicrosoftMicrosoft .NET Framework 3.5 AND 4.8 on Windows Server, version 1903 (Server Core installation)1 version range

1903

MicrosoftMicrosoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for 32-bit Systems0 version ranges

No version detail published.

MicrosoftMicrosoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for x64-based Systems0 version ranges

No version detail published.

MicrosoftMicrosoft .NET Framework 3.5 AND 4.7.2 on Windows Server 20190 version ranges

No version detail published.

MicrosoftMicrosoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019 (Server Core installation)0 version ranges

No version detail published.

MicrosoftMicrosoft .NET Framework 4.62 version ranges

Windows Server 2008 for 32-bit Systems Service Pack 2
Windows Server 2008 for x64-based Systems Service Pack 2

MicrosoftMicrosoft .NET Framework 3.03 version ranges

Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2
Service Pack 2 on Windows Server 2008 for Itanium-Based Systems Service Pack 2
Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2

MicrosoftMicrosoft .NET Framework 3.57 version ranges

Windows 10 Version 1607 for 32-bit Systems
Windows 8.1 for 32-bit systems
Windows 8.1 for x64-based systems
Windows Server 2012
Windows Server 2012 (Server Core installation)
Windows Server 2012 R2
Windows Server 2012 R2 (Server Core installation)

MicrosoftMicrosoft .NET Framework 3.5.15 version ranges

Windows 7 for 32-bit Systems Service Pack 1
Windows 7 for x64-based Systems Service Pack 1
Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1
Windows Server 2008 R2 for x64-based Systems Service Pack 1
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)

MicrosoftMicrosoft .NET Framework 4.5.213 version ranges

Windows 7 for 32-bit Systems Service Pack 1
Windows 7 for x64-based Systems Service Pack 1
Windows 8.1 for 32-bit systems
Windows 8.1 for x64-based systems
Windows RT 8.1
Windows Server 2008 for 32-bit Systems Service Pack 2
Windows Server 2008 for x64-based Systems Service Pack 2
Windows Server 2008 R2 for x64-based Systems Service Pack 1
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
Windows Server 2012
Windows Server 2012 (Server Core installation)
Windows Server 2012 R2
Windows Server 2012 R2 (Server Core installation)

MicrosoftMicrosoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1909 for 32-bit Systems0 version ranges

No version detail published.

MicrosoftMicrosoft .NET Framework 3.5 AND 4.8 on Windows Server, version 1909 (Server Core installation)0 version ranges

No version detail published.

MicrosoftMicrosoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1909 for x64-based Systems0 version ranges

No version detail published.

MicrosoftMicrosoft .NET Framework 3.5 AND 4.7.2 on Windows Server, version 1803 (Server Core Installation)0 version ranges

No version detail published.

MicrosoftMicrosoft .NET Framework 3.5 AND 4.7.2 on Windows 10 for 32-bit Systems0 version ranges

No version detail published.

MicrosoftMicrosoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1803 for 32-bit Systems0 version ranges

No version detail published.

MicrosoftMicrosoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1803 for x64-based Systems0 version ranges

No version detail published.

MicrosoftMicrosoft .NET Framework 3.5 AND 4.7.1/4.7.2 on Windows 10 Version 1709 for x64-based Systems0 version ranges

No version detail published.

MicrosoftMicrosoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016 (Server Core installation)0 version ranges

No version detail published.

MicrosoftMicrosoft .NET Framework 3.5 AND 4.7.2 on Windows 10 for x64-based Systems0 version ranges

No version detail published.

MicrosoftMicrosoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607 for 32-bit Systems0 version ranges

No version detail published.

MicrosoftMicrosoft .NET Framework 3.5 AND 4.7.1/4.7.2 on Windows 10 Version 1709 for 32-bit Systems0 version ranges

No version detail published.

MicrosoftMicrosoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607 for x64-based Systems0 version ranges

No version detail published.

MicrosoftMicrosoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 20160 version ranges

No version detail published.

Sources

Refreshed hourly from the sources above. Last fetched 2026-11-08 08:30 UTC.