critical
9.8
CVE-2020-0646 kev in the critical feed json
A remote code execution vulnerability exists when the Microsoft .NET Framework fails to validate input properly, aka '.NET Framework Remote…
published 6y ago modified 4mo ago also EUVD-2020-2140
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Exploited
- added 2021-11-03
- epss
- 99.2%
- EPSS 99.2% chance of exploitation in 30 days, percentile 99.9%
- public exploits
- 2
- Metasploit and Exploit-DB
Summary
A remote code execution vulnerability exists when the Microsoft .NET Framework fails to validate input properly, aka '.NET Framework Remote Code Execution Injection Vulnerability'.
Patch / fix
cisa required action Apply updates per vendor instructions.
Is CVE-2020-0646 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerTimeline
- Published
- First public exploit (Metasploit exploit/windows/http/sharepoint_workflows_xoml)
- Added to CISA KEV
- CISA patch deadline
- CISA SSVC: exploitation active
Known exploited
- Added
- 5y ago
- Patch by
- 2022-05-03 (4y ago)
- Ransomware
- Not known
- Required action
- Apply updates per vendor instructions.
- Vendor, product
- Microsoft, .NET Framework
- CISA name
- Microsoft .NET Framework Remote Code Execution Vulnerability
CISA SSVC
- Exploitation
- Active, exploited in the wild
- Automatable
- yes
- Technical impact
- total
- Assessed
- last yr.
Exploit prediction
99.22% chance of exploitation in the next 30 days, higher than 99.9% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- Metasploit exploit/windows/http/sharepoint_workflows_xoml SharePoint Workflows XOML Injection metasploit exploit, excellent rank, 2020-03-02
- EDB-48275 SharePoint Workflows - XOML Injection (Metasploit) remote, 2020-03-31
- packetstormsecurity.com http://packetstormsecurity.com/files/156930/SharePoint-Workflows-XOML-Injection.html referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 10.0 | AV:N/AC:L/Au:N/C:C/I:C/A:C |
Affected products
- Microsoft Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2
- Microsoft Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2
- Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1803 for 32-bit Systems
- Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1803 for x64-based Systems
- Microsoft Microsoft .NET Framework 4.8 on Windows Server, version 1803 (Server Core Installation)
- Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1709 for 32-bit Systems
- Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1709 for x64-based Systems
- Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for 32-bit Systems
- Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for x64-based Systems
- Microsoft Microsoft .NET Framework 4.8 on Windows Server 2016
- Microsoft Microsoft .NET Framework 4.8 on Windows Server 2016 (Server Core installation)
- Microsoft Microsoft .NET Framework 4.8 on Windows 7 for 32-bit Systems Service Pack 1
- Microsoft Microsoft .NET Framework 4.8 on Windows 7 for x64-based Systems Service Pack 1
- Microsoft Microsoft .NET Framework 4.8 on Windows 8.1 for 32-bit systems
- Microsoft Microsoft .NET Framework 4.8 on Windows 8.1 for x64-based systems
- Microsoft Microsoft .NET Framework 4.8 on Windows RT 8.1
- Microsoft Microsoft .NET Framework 4.8 on Windows Server 2008 R2 for x64-based Systems Service Pack 1
- Microsoft Microsoft .NET Framework 4.8 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
- Microsoft Microsoft .NET Framework 4.8 on Windows Server 2012
- Microsoft Microsoft .NET Framework 4.8 on Windows Server 2012 (Server Core installation)
- Microsoft Microsoft .NET Framework 4.8 on Windows Server 2012 R2
- Microsoft Microsoft .NET Framework 4.8 on Windows Server 2012 R2 (Server Core installation)
- Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for 32-bit Systems
- Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for x64-based Systems
- Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019
- Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019 (Server Core installation)
- Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1903 for 32-bit Systems
- Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1903 for x64-based Systems
- Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows Server, version 1903 (Server Core installation)
- Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for 32-bit Systems
- Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for x64-based Systems
- Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019
- Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019 (Server Core installation)
- Microsoft Microsoft .NET Framework 4.6
- Microsoft Microsoft .NET Framework 3.0
- Microsoft Microsoft .NET Framework 3.5
- Microsoft Microsoft .NET Framework 3.5.1
- Microsoft Microsoft .NET Framework 4.5.2
- Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1909 for 32-bit Systems
- Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows Server, version 1909 (Server Core installation)
- Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1909 for x64-based Systems
- Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server, version 1803 (Server Core Installation)
- Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 for 32-bit Systems
- Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1803 for 32-bit Systems
- Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1803 for x64-based Systems
- Microsoft Microsoft .NET Framework 3.5 AND 4.7.1/4.7.2 on Windows 10 Version 1709 for x64-based Systems
- 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)
- Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 for x64-based Systems
- 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
- Microsoft Microsoft .NET Framework 3.5 AND 4.7.1/4.7.2 on Windows 10 Version 1709 for 32-bit Systems
Classification
- Weakness
-
- CWE-91 XML Injection
References
-
portal.msrc.microsoft.com
/en-US/security-guidance/advisory/CVE-2020-0646
patch, vendor-advisory
-
packetstormsecurity.com
/files/156930/SharePoint-Workflows-XOML-Injection.html
exploit, third-party-advisory, vdb-entry
-
cisa.gov
/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-0646
government-resource, us-government-resource
Sources
- CVE List CVE-2020-0646
- NVD CVE-2020-0646
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.