CVE-2020-0646
A remote code execution vulnerability exists when the Microsoft .NET Framework fails to validate...
A remote code execution vulnerability exists when the Microsoft .NET Framework fails to validate input properly, aka '.NET Framework Remote Code Execution Injection Vulnerability'.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
A remote code execution vulnerability exists when the Microsoft .NET Framework fails to validate input properly, aka '.NET Framework Remote Code Execution Injection Vulnerability'.
- Record
CVE-2020-0646- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 10.0 High
AV:N/AC:L/Au:N/C:C/I:C/A:C - Weakness
- CWE-91
- Updated
- 2026-11-02
CVE List
A remote code execution vulnerability exists when the Microsoft .NET Framework fails to validate input properly, aka '.NET Framework Remote Code Execution Injection Vulnerability'.
- Record
CVE-2020-0646- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-91
- Updated
- 2026-11-02
EUVDEUVD-2020-2140
A remote code execution vulnerability exists when the Microsoft .NET Framework fails to validate input properly, aka '.NET Framework Remote Code Execution Injection Vulnerability'.
- Record
EUVD-2020-2140- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-4w3v-83v8-mg94
A remote code execution vulnerability exists when the Microsoft .NET Framework fails to validate...
A remote code execution vulnerability exists when the Microsoft .NET Framework fails to validate input properly, aka '.NET Framework Remote Code Execution Injection Vulnerability'.
- Record
GHSA-4w3v-83v8-mg94- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-20, CWE-78, CWE-91
- Updated
- 2026-11-02
CISA KEV No score
Microsoft .NET Framework Remote Code Execution Vulnerability
Microsoft .NET Framework contains an improper input validation vulnerability that allows for remote code execution.
- Record
CVE-2020-0646- Weakness
- CWE-91
- Updated
- 2026-11-02
Affected products
- microsoft .net framework
- microsoft .net framework 3.0
- microsoft .net framework 3.5
- 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
- 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
- microsoft .net framework 3.5 and 4.6.2/4.7/4.7.1/4.7.2 on windows server 2016
- microsoft .net framework 3.5 and 4.6.2/4.7/4.7.1/4.7.2 on windows server 2016 (server core installation)
- microsoft .net framework 3.5 and 4.7.1/4.7.2 on windows 10 version 1709 for 32-bit systems
- microsoft .net framework 3.5 and 4.7.1/4.7.2 on windows 10 version 1709 for x64-based systems
- microsoft .net framework 3.5 and 4.7.2 on windows 10 for 32-bit systems
- microsoft .net framework 3.5 and 4.7.2 on windows 10 for x64-based systems
- microsoft .net framework 3.5 and 4.7.2 on windows 10 version 1803 for 32-bit systems
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- microsoft .net framework 3.5 and 4.7.2 on windows 10 version 1803 for x64-based systems
- microsoft .net framework 3.5 and 4.7.2 on windows 10 version 1809 for 32-bit systems
- microsoft .net framework 3.5 and 4.7.2 on windows 10 version 1809 for x64-based systems
- microsoft .net framework 3.5 and 4.7.2 on windows server 2019
- microsoft .net framework 3.5 and 4.7.2 on windows server 2019 (server core installation)
- microsoft .net framework 3.5 and 4.7.2 on windows server, version 1803 (server core installation)
- microsoft .net framework 3.5 and 4.8 on windows 10 version 1809 for 32-bit systems
- microsoft .net framework 3.5 and 4.8 on windows 10 version 1809 for x64-based systems
- microsoft .net framework 3.5 and 4.8 on windows 10 version 1903 for 32-bit systems
- microsoft .net framework 3.5 and 4.8 on windows 10 version 1903 for x64-based systems
- microsoft .net framework 3.5 and 4.8 on windows 10 version 1909 for 32-bit systems
- microsoft .net framework 3.5 and 4.8 on windows 10 version 1909 for x64-based systems
- microsoft .net framework 3.5 and 4.8 on windows server 2019
- microsoft .net framework 3.5 and 4.8 on windows server 2019 (server core installation)
- microsoft .net framework 3.5 and 4.8 on windows server, version 1903 (server core installation)
- microsoft .net framework 3.5 and 4.8 on windows server, version 1909 (server core installation)
- microsoft .net framework 3.5.1
- microsoft .net framework 4.5.2
- microsoft .net framework 4.6
- microsoft .net framework 4.6.2/4.7/4.7.1/4.7.2
- microsoft .net framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2
- microsoft .net framework 4.8 on windows 10 version 1607 for 32-bit systems
- microsoft .net framework 4.8 on windows 10 version 1607 for x64-based systems
- microsoft .net framework 4.8 on windows 10 version 1709 for 32-bit systems
- microsoft .net framework 4.8 on windows 10 version 1709 for x64-based systems
- microsoft .net framework 4.8 on windows 10 version 1803 for 32-bit systems
- microsoft .net framework 4.8 on windows 10 version 1803 for x64-based systems
- microsoft .net framework 4.8 on windows 7 for 32-bit systems service pack 1
- microsoft .net framework 4.8 on windows 7 for x64-based systems service pack 1
- microsoft .net framework 4.8 on windows 8.1 for 32-bit systems
- microsoft .net framework 4.8 on windows 8.1 for x64-based systems
- microsoft .net framework 4.8 on windows rt 8.1
- microsoft .net framework 4.8 on windows server 2008 r2 for x64-based systems service pack 1
- microsoft .net framework 4.8 on windows server 2008 r2 for x64-based systems service pack 1 (server core installation)
- microsoft .net framework 4.8 on windows server 2012
- microsoft .net framework 4.8 on windows server 2012 (server core installation)
- microsoft .net framework 4.8 on windows server 2012 r2
- microsoft .net framework 4.8 on windows server 2012 r2 (server core installation)
- microsoft .net framework 4.8 on windows server 2016
- microsoft .net framework 4.8 on windows server 2016 (server core installation)
- microsoft .net framework 4.8 on windows server, version 1803 (server core installation)
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Metasploit | SharePoint Workflows XOML Injection | 2020-03-02 |
| Exploit-DB | SharePoint Workflows - XOML Injection (Metasploit) | 2020-03-31 |
History
| Recorded | Changed | Sources |
|---|---|---|
| exploitation, exploits | ||
| first indexed | CVE List, EUVD, Exploit-DB, GitHub Advisories, CISA KEV, Metasploit, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-0646 is a critical vulnerability (CVSS 9.8) in Microsoft .net Framework, published January 14, 2020. CISA lists it as known to be exploited, since November 3, 2021. EUVD reports exploitation since November 3, 2021. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 99.2%, the 99th percentile. No source names a fixed version.
References
portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0646
packetstormsecurity.com/files/156930/SharePoint-Workflows-XOML-Injection.html
cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-0646
nvd.nist.gov/vuln/detail/CVE-2020-0646
github.com/advisories/GHSA-4w3v-83v8-mg94