November 13, 2026 Follow Egret
CVE-2020-0646 · CVE record: PUBLISHED

Microsoft .NET Framework Remote Code Execution Vulnerability

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, 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 Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016

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

Exploitation evidence

Known exploited · CISA KEV listed

Added 2021-11-03. Ransomware campaign use: Unknown.

CISA required action: Apply updates per vendor instructions.

CISA due date: 2022-05-03. This is the catalog’s deadline, not an assessment of your organization’s exposure.

KEV checked 13 Nov 2026, 00:20 Jerusalem · Original catalog ↗

Reported products and versions

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

Default status: Not specified

  • 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

Default status: Not specified

  • affected: Windows 10 Version 1607 for 32-bit Systems

Microsoft / Microsoft .NET Framework 4.8 on Windows 10 Version 1803 for 32-bit Systems

Default status: Not specified

  • affected: unspecified

Microsoft / Microsoft .NET Framework 4.8 on Windows 10 Version 1803 for x64-based Systems

Default status: Not specified

  • affected: unspecified

Microsoft / Microsoft .NET Framework 4.8 on Windows Server, version 1803 (Server Core Installation)

Default status: Not specified

  • affected: unspecified

Microsoft / Microsoft .NET Framework 4.8 on Windows 10 Version 1709 for 32-bit Systems

Default status: Not specified

  • affected: unspecified

Microsoft / Microsoft .NET Framework 4.8 on Windows 10 Version 1709 for x64-based Systems

Default status: Not specified

  • affected: unspecified

Microsoft / Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for 32-bit Systems

Default status: Not specified

  • affected: unspecified

Microsoft / Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for x64-based Systems

Default status: Not specified

  • affected: unspecified

Microsoft / Microsoft .NET Framework 4.8 on Windows Server 2016

Default status: Not specified

  • affected: unspecified

Microsoft / Microsoft .NET Framework 4.8 on Windows Server 2016 (Server Core installation)

Default status: Not specified

  • affected: unspecified

Microsoft / Microsoft .NET Framework 4.8 on Windows 7 for 32-bit Systems Service Pack 1

Default status: Not specified

  • affected: unspecified

Microsoft / Microsoft .NET Framework 4.8 on Windows 7 for x64-based Systems Service Pack 1

Default status: Not specified

  • affected: unspecified

Microsoft / Microsoft .NET Framework 4.8 on Windows 8.1 for 32-bit systems

Default status: Not specified

  • affected: unspecified

Microsoft / Microsoft .NET Framework 4.8 on Windows 8.1 for x64-based systems

Default status: Not specified

  • affected: unspecified

Microsoft / Microsoft .NET Framework 4.8 on Windows RT 8.1

Default status: Not specified

  • affected: unspecified

Microsoft / Microsoft .NET Framework 4.8 on Windows Server 2008 R2 for x64-based Systems Service Pack 1

Default status: Not specified

  • affected: unspecified

Microsoft / Microsoft .NET Framework 4.8 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)

Default status: Not specified

  • affected: unspecified

Microsoft / Microsoft .NET Framework 4.8 on Windows Server 2012

Default status: Not specified

  • affected: unspecified

Microsoft / Microsoft .NET Framework 4.8 on Windows Server 2012 (Server Core installation)

Default status: Not specified

  • affected: unspecified

Microsoft / Microsoft .NET Framework 4.8 on Windows Server 2012 R2

Default status: Not specified

  • affected: unspecified

Microsoft / Microsoft .NET Framework 4.8 on Windows Server 2012 R2 (Server Core installation)

Default status: Not specified

  • affected: unspecified

Microsoft / Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for 32-bit Systems

Default status: Not specified

  • affected: unspecified

Microsoft / Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for x64-based Systems

Default status: Not specified

  • affected: unspecified

Microsoft / Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019

Default status: Not specified

  • affected: unspecified

Microsoft / Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019 (Server Core installation)

Default status: Not specified

  • affected: unspecified

Microsoft / Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1903 for 32-bit Systems

Default status: Not specified

  • affected: unspecified

Microsoft / Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1903 for x64-based Systems

Default status: Not specified

  • affected: unspecified

Microsoft / Microsoft .NET Framework 3.5 AND 4.8 on Windows Server, version 1903 (Server Core installation)

Default status: Not specified

  • affected: 1903

Microsoft / Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for 32-bit Systems

Default status: Not specified

  • affected: unspecified

Microsoft / Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for x64-based Systems

Default status: Not specified

  • affected: unspecified

Microsoft / Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019

Default status: Not specified

  • affected: unspecified

Microsoft / Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019 (Server Core installation)

Default status: Not specified

  • affected: unspecified

Microsoft / Microsoft .NET Framework 4.6

Default status: Not specified

  • 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

Default status: Not specified

  • 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

Default status: Not specified

  • 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

Default status: Not specified

  • 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

Default status: Not specified

  • 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

Default status: Not specified

  • affected: unspecified

Microsoft / Microsoft .NET Framework 3.5 AND 4.8 on Windows Server, version 1909 (Server Core installation)

Default status: Not specified

  • affected: unspecified

Microsoft / Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1909 for x64-based Systems

Default status: Not specified

  • affected: unspecified

Microsoft / Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server, version 1803 (Server Core Installation)

Default status: Not specified

  • affected: unspecified

Microsoft / Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 for 32-bit Systems

Default status: Not specified

  • affected: unspecified

Microsoft / Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1803 for 32-bit Systems

Default status: Not specified

  • affected: unspecified

Microsoft / Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1803 for x64-based Systems

Default status: Not specified

  • affected: unspecified

Microsoft / Microsoft .NET Framework 3.5 AND 4.7.1/4.7.2 on Windows 10 Version 1709 for x64-based Systems

Default status: Not specified

  • 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)

Default status: Not specified

  • affected: unspecified

Microsoft / Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 for x64-based Systems

Default status: Not specified

  • 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

Default status: Not specified

  • affected: unspecified

Microsoft / Microsoft .NET Framework 3.5 AND 4.7.1/4.7.2 on Windows 10 Version 1709 for 32-bit Systems

Default status: Not specified

  • 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

Default status: Not specified

  • affected: unspecified

Microsoft / Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016

Default status: Not specified

  • affected: unspecified

Fixes and workarounds

No explicit solution text in the downloaded CVE record. Consult the vendor advisory; unaffected version ranges are shown above as reported, not inferred as a patch recommendation.

Sources and related reporting

CVE Program record ↗ · Download tracked evidence as JSON

Observed change timeline

History begins when Egret first downloads each source. It is not the complete upstream CVE history.

12 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-12",
  "epss": 0.99222,
  "percentile": 0.99935
}
10 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-10",
  "epss": 0.99222,
  "percentile": 0.99935
}
09 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-09",
  "epss": 0.99222,
  "percentile": 0.99935
}
08 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-08",
  "epss": 0.99222,
  "percentile": 0.99935
}
07 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-07",
  "epss": 0.99222,
  "percentile": 0.99935
}
06 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-06",
  "epss": 0.99222,
  "percentile": 0.99935
}
06 Nov 2026, 06:20 Jerusalem · CVE Program record changed

Stored CNA snapshot at this observation.

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        "references": [
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            "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0646"
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          {
            "tags": [
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            "url": "http://packetstormsecurity.com/files/156930/SharePoint-Workflows-XOML-Injection.html"
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        "metrics": [
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              "confidentialityImpact": "HIGH",
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              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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        "problemTypes": [
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                "cweId": "CWE-91",
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      "affected": [
        {
          "product": "Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2",
          "vendor": "Microsoft",
          "versions": [
            {
              "status": "affected",
              "version": "Windows 7 for 32-bit Systems Service Pack 1"
            },
            {
              "status": "affected",
              "version": "Windows 7 for x64-based Systems Service Pack 1"
            },
            {
              "status": "affected",
              "version": "Windows 8.1 for 32-bit systems"
            },
            {
              "status": "affected",
              "version": "Windows 8.1 for x64-based systems"
            },
            {
              "status": "affected",
              "version": "Windows RT 8.1"
            },
            {
              "status": "affected",
              "version": "Windows Server 2008 R2 for x64-based Systems Service Pack 1"
            },
            {
              "status": "affected",
              "version": "Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)"
            },
            {
              "status": "affected",
              "version": "Windows Server 2012"
            },
            {
              "status": "affected",
              "version": "Windows Server 2012 (Server Core installation)"
            },
            {
              "status": "affected",
              "version": "Windows Server 2012 R2"
            },
            {
              "status": "affected",
              "version": "Windows Server 2012 R2 (Server Core installation)"
            }
          ]
        },
        {
          "product": "Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2",
          "vendor": "Microsoft",
          "versions": [
            {
              "status": "affected",
              "version": "Windows 10 Version 1607 for 32-bit Systems"
            }
          ]
        },
        {
          "product": "Microsoft .NET Framework 4.8 on Windows 10 Version 1803 for 32-bit Systems",
          "vendor": "Microsoft",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified"
            }
          ]
        },
        {
          "product": "Microsoft .NET Framework 4.8 on Windows 10 Version 1803 for x64-based Systems",
          "vendor": "Microsoft",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified"
            }
          ]
        },
        {
          "product": "Microsoft .NET Framework 4.8 on Windows Server, version 1803  (Server Core Installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified"
            }
          ]
        },
        {
          "product": "Microsoft .NET Framework 4.8 on Windows 10 Version 1709 for 32-bit Systems",
          "vendor": "Microsoft",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified"
            }
          ]
        },
        {
          "product": "Microsoft .NET Framework 4.8 on Windows 10 Version 1709 for x64-based Systems",
          "vendor": "Microsoft",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified"
            }
          ]
        },
        {
          "product": "Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for 32-bit Systems",
          "vendor": "Microsoft",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified"
            }
          ]
        },
        {
          "product": "Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for x64-based Systems",
          "vendor": "Microsoft",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified"
            }
          ]
        },
        {
          "product": "Microsoft .NET Framework 4.8 on Windows Server 2016",
          "vendor": "Microsoft",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified"
            }
          ]
        },
        {
          "product": "Microsoft .NET Framework 4.8 on Windows Server 2016  (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified"
            }
          ]
        },
        {
          "product": "Microsoft .NET Framework 4.8 on Windows 7 for 32-bit Systems Service Pack 1",
          "vendor": "Microsoft",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified"
            }
          ]
        },
        {
          "product": "Microsoft .NET Framework 4.8 on Windows 7 for x64-based Systems Service Pack 1",
          "vendor": "Microsoft",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified"
            }
          ]
        },
        {
          "product": "Microsoft .NET Framework 4.8 on Windows 8.1 for 32-bit systems",
          "vendor": "Microsoft",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified"
            }
          ]
        },
        {
          "product": "Microsoft .NET Framework 4.8 on Windows 8.1 for x64-based systems",
          "vendor": "Microsoft",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified"
            }
          ]
        },
        {
          "product": "Microsoft .NET Framework 4.8 on Windows RT 8.1",
          "vendor": "Microsoft",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified"
            }
          ]
        },
        {
          "product": "Microsoft .NET Framework 4.8 on Windows Server 2008 R2 for x64-based Systems Service Pack 1",
          "vendor": "Microsoft",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified"
            }
          ]
        },
        {
          "product": "Microsoft .NET Framework 4.8 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified"
            }
          ]
        },
        {
          "product": "Microsoft .NET Framework 4.8 on Windows Server 2012",
          "vendor": "Microsoft",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified"
            }
          ]
        },
        {
          "product": "Microsoft .NET Framework 4.8 on Windows Server 2012 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified"
            }
          ]
        },
        {
          "product": "Microsoft .NET Framework 4.8 on Windows Server 2012 R2",
          "vendor": "Microsoft",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified"
            }
          ]
        },
        {
          "product": "Microsoft .NET Framework 4.8 on Windows Server 2012 R2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified"
            }
          ]
        },
        {
          "product": "Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for 32-bit Systems",
          "vendor": "Microsoft",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified"
            }
          ]
        },
        {
          "product": "Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for x64-based Systems",
          "vendor": "Microsoft",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified"
            }
          ]
        },
        {
          "product": "Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019",
          "vendor": "Microsoft",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified"
            }
          ]
        },
        {
          "product": "Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019  (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified"
            }
          ]
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                      "product_name": "Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 for 32-bit Systems",
                      "version": {
                        "version_data": [
                          {
                            "version_value": ""
                          }
                        ]
                      }
                    },
                    {
                      "product_name": "Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1803 for 32-bit Systems",
                      "version": {
                        "version_data": [
                          {
                            "version_value": ""
                          }
                        ]
                      }
                    },
                    {
                      "product_name": "Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1803 for x64-based Systems",
                      "version": {
                        "version_data": [
                          {
                            "version_value": ""
                          }
                        ]
                      }
                    },
                    {
                      "product_name": "Microsoft .NET Framework 3.5 AND 4.7.1/4.7.2 on Windows 10 Version 1709 for x64-based Systems",
                      "version": {
                        "version_data": [
                          {
                            "version_value": ""
                          }
                        ]
                      }
                    },
                    {
                      "product_name": "Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016  (Server Core installation)",
                      "version": {
                        "version_data": [
                          {
                            "version_value": ""
                          }
                        ]
                      }
                    },
                    {
                      "product_name": "Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 for x64-based Systems",
                      "version": {
                        "version_data": [
                          {
                            "version_value": ""
                          }
                        ]
                      }
                    },
                    {
                      "product_name": "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",
                      "version": {
                        "version_data": [
                          {
                            "version_value": ""
                          }
                        ]
                      }
                    },
                    {
                      "product_name": "Microsoft .NET Framework 3.5 AND 4.7.1/4.7.2 on Windows 10 Version 1709 for 32-bit Systems",
                      "version": {
                        "version_data": [
                          {
                            "version_value": ""
                          }
                        ]
                      }
                    },
                    {
                      "product_name": "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",
                      "version": {
                        "version_data": [
                          {
                            "version_value": ""
                          }
                        ]
                      }
                    },
                    {
                      "product_name": "Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016",
                      "version": {
                        "version_data": [
                          {
                            "version_value": ""
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "Microsoft"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "A remote code execution vulnerability exists when the Microsoft .NET Framework fails to validate input properly, aka '.NET Framework Remote Code Execution Injection Vulnerability'."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "Remote Code Execution"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0646",
              "refsource": "MISC",
              "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0646"
            },
            {
              "name": "http://packetstormsecurity.com/files/156930/SharePoint-Workflows-XOML-Injection.html",
              "refsource": "MISC",
              "url": "http://packetstormsecurity.com/files/156930/SharePoint-Workflows-XOML-Injection.html"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2020-0646",
    "datePublished": "2020-01-14T23:11:38.000Z",
    "dateReserved": "2019-11-04T00:00:00.000Z",
    "dateUpdated": "2025-10-21T23:35:53.664Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}
05 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-05",
  "epss": 0.99222,
  "percentile": 0.99935
}
04 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-04",
  "epss": 0.99222,
  "percentile": 0.99935
}
03 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-03",
  "epss": 0.99222,
  "percentile": 0.99935
}
03 Nov 2026, 02:22 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-02",
  "epss": 0.99222,
  "percentile": 0.99935
}
03 Nov 2026, 02:22 Jerusalem · CISA KEV status changed

Stored KEV snapshot at this observation.

{
  "cveID": "CVE-2020-0646",
  "cwes": [
    "CWE-91"
  ],
  "dateAdded": "2021-11-03",
  "dueDate": "2022-05-03",
  "forensicTriage": "No",
  "knownRansomwareCampaignUse": "Unknown",
  "notes": "https://nvd.nist.gov/vuln/detail/CVE-2020-0646",
  "product": ".NET Framework",
  "requiredAction": "Apply updates per vendor instructions.",
  "shortDescription": "Microsoft .NET Framework contains an improper input validation vulnerability that allows for remote code execution.",
  "vendorProject": "Microsoft",
  "vulnerabilityName": "Microsoft .NET Framework Remote Code Execution Vulnerability"
}
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