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Critical 9.8Known exploited (CISA KEV)Published Jan 14, 2020
CVE-2020-0646A remote code execution vulnerability exists when the Microsoft .NET Framework fails to validate input properly, aka '.NET Framework Remote Code Execution Injection Vulnerability'.
Updated under an hour ago ()
Does this affect you?
It affects Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 and 52 other products. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Nov 3, 2021; federal agencies had to remediate by May 3, 2022. Treat that date as your deadline.
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A remote code execution vulnerability exists when the Microsoft .NET Framework fails to validate input properly, aka '.NET Framework Remote Code Execution Injection Vulnerability'.
- CVSS
- 9.8 CRITICAL (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-91
- Known exploited
- Added to CISA KEV Nov 3, 2021; federal remediation due May 3, 2022Apply updates per vendor instructions.
- EPSS (exploitation in the next 30 days)
- 99.22% (percentile 100)
- Assigned by
- microsoft
- NVD analysis
- Analyzed
- Record last updated
- Oct 21, 2025
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Microsoft Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 microsoft:net_framework_4.6_4.6.1_4.6.2_4.7_4.7.1_4.7.2 (from the name) | 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; and 3 more ranges | CNA record |
Microsoft Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 microsoft:net_framework_4.6.2_4.7_4.7.1_4.7.2 (from the name) | Windows 10 Version 1607 for 32-bit Systems | CNA record |
Microsoft 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_32_bit_systems (from the name) | unspecified | CNA record |
Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1803 for x64-based Systems microsoft:net_framework_4.8_on_windows_10_version_1803_for_x64_based_systems (from the name) | unspecified | CNA record |
Microsoft Microsoft .NET Framework 4.8 on Windows Server, version 1803 (Server Core Installation) microsoft:net_framework_4.8_on_windows_server_version_1803_server_core_installation (from the name) | unspecified | CNA record |
Microsoft 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_32_bit_systems (from the name) | unspecified | CNA record |
Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1709 for x64-based Systems microsoft:net_framework_4.8_on_windows_10_version_1709_for_x64_based_systems (from the name) | unspecified | CNA record |
Microsoft 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_32_bit_systems (from the name) | unspecified | CNA record |
Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for x64-based Systems microsoft:net_framework_4.8_on_windows_10_version_1607_for_x64_based_systems (from the name) | unspecified | CNA record |
Microsoft Microsoft .NET Framework 4.8 on Windows Server 2016 microsoft:net_framework_4.8_on_windows_server_2016 (from the name) | unspecified | CNA record |
Microsoft Microsoft .NET Framework 4.8 on Windows Server 2016 (Server Core installation) microsoft:net_framework_4.8_on_windows_server_2016_server_core_installation (from the name) | unspecified | CNA record |
Microsoft Microsoft .NET Framework 4.8 on Windows 7 for 32-bit Systems Service Pack 1 microsoft:net_framework_4.8_on_windows_7_for_32_bit_systems_service_pack_1 (from the name) | unspecified | CNA record |
Microsoft Microsoft .NET Framework 4.8 on Windows 7 for x64-based Systems Service Pack 1 microsoft:net_framework_4.8_on_windows_7_for_x64_based_systems_service_pack_1 (from the name) | unspecified | CNA record |
Microsoft Microsoft .NET Framework 4.8 on Windows 8.1 for 32-bit systems microsoft:net_framework_4.8_on_windows_8.1_for_32_bit_systems (from the name) | unspecified | CNA record |
Microsoft Microsoft .NET Framework 4.8 on Windows 8.1 for x64-based systems microsoft:net_framework_4.8_on_windows_8.1_for_x64_based_systems (from the name) | unspecified | CNA record |
Microsoft Microsoft .NET Framework 4.8 on Windows RT 8.1 microsoft:net_framework_4.8_on_windows_rt_8.1 (from the name) | unspecified | CNA record |
Microsoft 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 (from the name) | unspecified | CNA record |
Microsoft 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_2008_r2_for_x64_based_systems_service_pack_1_server_core_installation (from the name) | unspecified | CNA record |
Microsoft Microsoft .NET Framework 4.8 on Windows Server 2012 microsoft:net_framework_4.8_on_windows_server_2012 (from the name) | unspecified | CNA record |
Microsoft Microsoft .NET Framework 4.8 on Windows Server 2012 (Server Core installation) microsoft:net_framework_4.8_on_windows_server_2012_server_core_installation (from the name) | unspecified | CNA record |
Microsoft Microsoft .NET Framework 4.8 on Windows Server 2012 R2 microsoft:net_framework_4.8_on_windows_server_2012_r2 (from the name) | unspecified | CNA record |
Microsoft Microsoft .NET Framework 4.8 on Windows Server 2012 R2 (Server Core installation) microsoft:net_framework_4.8_on_windows_server_2012_r2_server_core_installation (from the name) | unspecified | CNA record |
Microsoft 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_32_bit_systems (from the name) | unspecified | CNA record |
Microsoft 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_1809_for_x64_based_systems (from the name) | unspecified | CNA record |
Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019 microsoft:net_framework_3.5_and_4.8_on_windows_server_2019 (from the name) | unspecified | CNA record |
Microsoft 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_2019_server_core_installation (from the name) | unspecified | CNA record |
Microsoft 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_32_bit_systems (from the name) | unspecified | CNA record |
Microsoft 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_1903_for_x64_based_systems (from the name) | unspecified | CNA record |
Microsoft 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_1903_server_core_installation (from the name) | 1903 | CNA record |
Microsoft 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_32_bit_systems (from the name) | unspecified | CNA record |
Microsoft 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_10_version_1809_for_x64_based_systems (from the name) | unspecified | CNA record |
Microsoft 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 (from the name) | unspecified | CNA record |
Microsoft 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_2019_server_core_installation (from the name) | unspecified | CNA record |
Microsoft Microsoft .NET Framework 4.6 microsoft:net_framework_4.6 (from the name) | Windows Server 2008 for 32-bit Systems Service Pack 2; Windows Server 2008 for x64-based Systems Service Pack 2 | CNA record |
Microsoft Microsoft .NET Framework 3.0 microsoft:net_framework_3.0 (from the name) | 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 | CNA record |
Microsoft Microsoft .NET Framework 3.5 microsoft:net_framework_3.5 (from the name) | 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) | CNA record |
Microsoft Microsoft .NET Framework 3.5.1 microsoft:net_framework_3.5.1 (from the name) | 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) | CNA record |
Microsoft Microsoft .NET Framework 4.5.2 microsoft:net_framework_4.5.2 (from the name) | 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; and 5 more ranges | CNA record |
Microsoft 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_32_bit_systems (from the name) | unspecified | CNA record |
Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows Server, version 1909 (Server Core installation) microsoft:net_framework_3.5_and_4.8_on_windows_server_version_1909_server_core_installation (from the name) | unspecified | CNA record |
Microsoft 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_10_version_1909_for_x64_based_systems (from the name) | unspecified | CNA record |
Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server, version 1803 (Server Core Installation) microsoft:net_framework_3.5_and_4.7.2_on_windows_server_version_1803_server_core_installation (from the name) | unspecified | CNA record |
Microsoft 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_32_bit_systems (from the name) | unspecified | CNA record |
Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1803 for 32-bit Systems microsoft:net_framework_3.5_and_4.7.2_on_windows_10_version_1803_for_32_bit_systems (from the name) | unspecified | CNA record |
Microsoft 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_1803_for_x64_based_systems (from the name) | unspecified | CNA record |
Microsoft 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_4.7.1_4.7.2_on_windows_10_version_1709_for_x64_based_systems (from the name) | unspecified | CNA record |
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:net_framework_3.5_and_4.6.2_4.7_4.7.1_4.7.2_on_windows_server_2016_server_core_installation (from the name) | unspecified | CNA record |
Microsoft 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_for_x64_based_systems (from the name) | unspecified | CNA record |
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: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 (from the name) | unspecified | CNA record |
Microsoft 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_32_bit_systems (from the name) | unspecified | CNA record |
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 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 (from the name) | unspecified | CNA record |
Microsoft 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 (from the name) | unspecified | CNA record |
microsoft .net_framework microsoft:.net_framework | 3.0; 3.5; 3.5; 4.6.2; 4.7; 4.7.1; 4.7.2; 3.5; and 20 more ranges | NVD |
References
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0646x-refsource-misc, patch, vendor-advisory
- http://packetstormsecurity.com/files/156930/SharePoint-Workflows-XOML-Injection.htmlx-refsource-misc, exploit, third-party-advisory, vdb-entry
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-0646us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.