CVE-2020-0646
A remote code execution vulnerability exists when the Microsoft .NET Framework fails to validate input properly, aka '.NET Framework…
- 9.8CriticalCVSS base score
- 99.2%Exploitation in 30 daysEPSS · top 0.1% of all CVEs
- YesKnown exploitedin CISA's KEV since 3 Nov 2021
- 2Public exploitsMetasploit, Nuclei and Exploit-DB
Description
A remote code execution vulnerability exists when the Microsoft .NET Framework fails to validate input properly, aka '.NET Framework Remote Code Execution Injection Vulnerability'.
Exploited in the wild
CISA lists this vulnerability in its Known Exploited Vulnerabilities catalog as Microsoft .NET Framework Remote Code Execution Vulnerability.
- Added
- 3 Nov 2021
- Fix due (US federal)
- 3 May 2022
- Used by ransomware
- Not known
Apply updates per vendor instructions.
ENISA's EU Vulnerability Database lists it as exploited, from CISA's KEV, since 3 Nov 2021.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. The public collections list a Metasploit module and an Exploit-DB entry for it. CISA's SSVC rates its exploitation: it is being exploited.
Show the exploits2
Metasploit modules1 module
- SharePoint Workflows XOML Injection (Metasploit module) (opens in a new tab)
exploit/windows/http/sharepoint_workflows_xomlRank excellentdisclosed 2 Mar 2020
Exploit-DB1 entry
- SharePoint Workflows - XOML Injection (Metasploit) (Exploit-DB entry) (opens in a new tab)
EDB-ID 48275remote, windowspublished 31 Mar 2020Verified
Modules, templates and exploits as listed by the Metasploit Framework (BSD-3-Clause), ProjectDiscovery's Nuclei templates (MIT) and the Exploit Database (GPLv2), read once a day. Where the data comes from
Timeline
ID reserved
By microsoft
- 2 months later
· 2 months later
Published
- 22 months later
· 22 months later
Added to CISA KEV
Known exploited in the wild
- 4 years later
· 4 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Analyzed | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 99.2% · top 0.1% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: active · Automatable: yes · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Affected products
Microsoft · Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2
- affected Windows 7 for 32-bit Systems Service Pack 1
- affected Windows 7 for x64-based Systems Service Pack 1
- affected Windows 8.1 for 32-bit systems
- affected Windows 8.1 for x64-based systems
- affected Windows RT 8.1
- affected Windows Server 2008 R2 for x64-based Systems Service Pack 1
- affected Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
- affected Windows Server 2012
- affected Windows Server 2012 (Server Core installation)
- affected Windows Server 2012 R2
- affected Windows Server 2012 R2 (Server Core installation)
Microsoft · Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2
- affected Windows 10 Version 1607 for 32-bit Systems
Microsoft · Microsoft .NET Framework 4.8 on Windows 10 Version 1803 for 32-bit Systems
- affected unspecified
Microsoft · Microsoft .NET Framework 4.8 on Windows 10 Version 1803 for x64-based Systems
- affected unspecified
Microsoft · Microsoft .NET Framework 4.8 on Windows Server, version 1803 (Server Core Installation)
- affected unspecified
Microsoft · Microsoft .NET Framework 4.8 on Windows 10 Version 1709 for 32-bit Systems
- affected unspecified
Microsoft · Microsoft .NET Framework 4.8 on Windows 10 Version 1709 for x64-based Systems
- affected unspecified
Microsoft · Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for 32-bit Systems
- affected unspecified
Microsoft · Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for x64-based Systems
- affected unspecified
Microsoft · Microsoft .NET Framework 4.8 on Windows Server 2016
- affected unspecified
Microsoft · Microsoft .NET Framework 4.8 on Windows Server 2016 (Server Core installation)
- affected unspecified
Microsoft · Microsoft .NET Framework 4.8 on Windows 7 for 32-bit Systems Service Pack 1
- affected unspecified
Microsoft · Microsoft .NET Framework 4.8 on Windows 7 for x64-based Systems Service Pack 1
- affected unspecified
Microsoft · Microsoft .NET Framework 4.8 on Windows 8.1 for 32-bit systems
- affected unspecified
Microsoft · Microsoft .NET Framework 4.8 on Windows 8.1 for x64-based systems
- affected unspecified
Microsoft · Microsoft .NET Framework 4.8 on Windows RT 8.1
- affected unspecified
Microsoft · Microsoft .NET Framework 4.8 on Windows Server 2008 R2 for x64-based Systems Service Pack 1
- affected unspecified
Microsoft · Microsoft .NET Framework 4.8 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
- affected unspecified
Microsoft · Microsoft .NET Framework 4.8 on Windows Server 2012
- affected unspecified
Microsoft · Microsoft .NET Framework 4.8 on Windows Server 2012 (Server Core installation)
- affected unspecified
Microsoft · Microsoft .NET Framework 4.8 on Windows Server 2012 R2
- affected unspecified
Microsoft · Microsoft .NET Framework 4.8 on Windows Server 2012 R2 (Server Core installation)
- affected unspecified
Microsoft · Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for 32-bit Systems
- affected unspecified
Microsoft · Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for x64-based Systems
- affected unspecified
Microsoft · Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019
- affected unspecified
Microsoft · Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019 (Server Core installation)
- affected unspecified
Microsoft · Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1903 for 32-bit Systems
- affected unspecified
Microsoft · Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1903 for x64-based Systems
- affected unspecified
Microsoft · Microsoft .NET Framework 3.5 AND 4.8 on Windows Server, version 1903 (Server Core installation)
- affected 1903
Microsoft · Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for 32-bit Systems
- affected unspecified
Microsoft · Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for x64-based Systems
- affected unspecified
Microsoft · Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019
- affected unspecified
Microsoft · Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019 (Server Core installation)
- affected unspecified
Microsoft · Microsoft .NET Framework 4.6
- affected Windows Server 2008 for 32-bit Systems Service Pack 2
- affected Windows Server 2008 for x64-based Systems Service Pack 2
Microsoft · Microsoft .NET Framework 3.0
- affected Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2
- affected Service Pack 2 on Windows Server 2008 for Itanium-Based Systems Service Pack 2
- affected Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2
Microsoft · Microsoft .NET Framework 3.5
- affected Windows 10 Version 1607 for 32-bit Systems
- affected Windows 8.1 for 32-bit systems
- affected Windows 8.1 for x64-based systems
- affected Windows Server 2012
- affected Windows Server 2012 (Server Core installation)
- affected Windows Server 2012 R2
- affected Windows Server 2012 R2 (Server Core installation)
Microsoft · Microsoft .NET Framework 3.5.1
- affected Windows 7 for 32-bit Systems Service Pack 1
- affected Windows 7 for x64-based Systems Service Pack 1
- affected Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1
- affected Windows Server 2008 R2 for x64-based Systems Service Pack 1
- affected Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
Microsoft · Microsoft .NET Framework 4.5.2
- affected Windows 7 for 32-bit Systems Service Pack 1
- affected Windows 7 for x64-based Systems Service Pack 1
- affected Windows 8.1 for 32-bit systems
- affected Windows 8.1 for x64-based systems
- affected Windows RT 8.1
- affected Windows Server 2008 for 32-bit Systems Service Pack 2
- affected Windows Server 2008 for x64-based Systems Service Pack 2
- affected Windows Server 2008 R2 for x64-based Systems Service Pack 1
- affected Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
- affected Windows Server 2012
- affected Windows Server 2012 (Server Core installation)
- affected Windows Server 2012 R2
- affected Windows Server 2012 R2 (Server Core installation)
Microsoft · Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1909 for 32-bit Systems
- affected unspecified
Microsoft · Microsoft .NET Framework 3.5 AND 4.8 on Windows Server, version 1909 (Server Core installation)
- affected unspecified
Microsoft · Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1909 for x64-based Systems
- affected unspecified
Microsoft · Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server, version 1803 (Server Core Installation)
- affected unspecified
Microsoft · Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 for 32-bit Systems
- affected unspecified
Microsoft · Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1803 for 32-bit Systems
- affected unspecified
Microsoft · Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1803 for x64-based Systems
- affected unspecified
Microsoft · Microsoft .NET Framework 3.5 AND 4.7.1/4.7.2 on Windows 10 Version 1709 for x64-based Systems
- affected unspecified
Microsoft · Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016 (Server Core installation)
- affected unspecified
Microsoft · Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 for x64-based Systems
- affected unspecified
Microsoft · 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
- affected unspecified
Microsoft · Microsoft .NET Framework 3.5 AND 4.7.1/4.7.2 on Windows 10 Version 1709 for 32-bit Systems
- affected unspecified
Microsoft · 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
- affected unspecified
Microsoft · Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016
- affected unspecified
References
References3
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0646 (opens in a new tab)x_refsource_MISCx_transferred
- http://packetstormsecurity.com/files/156930/SharePoint-Workflows-XOML-Injection.html (opens in a new tab)x_refsource_MISCx_transferred
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-0646 (opens in a new tab)government-resource
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- CISA KEV catalog (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2020-2140 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2020-0646)Record last updated .