KEV Intelligence

Vulnerability report

Active exploitation observed Confirmed confidence In CISA KEV

CVE-2020-1147

Microsoft SharePoint Enterprise Server Remote Code Execution

Microsoft / Microsoft SharePoint Enterprise Server · 2016

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Severity
CVSS 7.8 · High
Confidence
Confirmed
Exploit status
Observed in sensors
EPSS
94.3%
First observed
23 Jul 2026
Last observed
07 Aug 2026

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2020-1147 is an unauthenticated vulnerability affecting Microsoft Microsoft SharePoint Enterprise Server and 72 other products. A remote code execution vulnerability exists in .NET Framework, Microsoft SharePoint,...

Is it exploited?

Yes. KEV Intelligence sensors observed exploitation attempts with confirmed confidence.

Who is affected?

Microsoft / Microsoft SharePoint Enterprise Server 2016.

What should we do?

Patch immediately, validate internet-facing exposure, and monitor for matching requests.

Overview

Microsoft SharePoint Enterprise Server Remote Code Execution

A remote code execution vulnerability exists in .NET Framework, Microsoft SharePoint, and Visual Studio when the software fails to check the source markup of XML file input, aka '.NET Framework, SharePoint Server, and Visual Studio Remote Code Execution Vulnerability'.

Vendor Product Affected Status
Microsoft Microsoft SharePoint Enterprise Server 2016 Affected
Microsoft Microsoft SharePoint Enterprise Server 2013 Service Pack 1 Affected
Microsoft Microsoft SharePoint Server 2019 Affected
Microsoft Microsoft SharePoint Server 2010 Service Pack 2 Affected
Microsoft Microsoft Visual Studio 2019 16.0 Affected
Microsoft Microsoft Visual Studio 2019 version 16.6 (includes 16.0 - 16.5) unspecified Affected
Microsoft Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8) unspecified Affected
Microsoft Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3) unspecified Affected
Microsoft .NET Core 2.1 Affected
Microsoft .NET Core 3.1 Affected
Microsoft Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 Windows 7 for 32-bit Systems Service Pack 1 Affected
Microsoft Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 Windows 7 for x64-based Systems Service Pack 1 Affected
Microsoft Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 Windows 8.1 for 32-bit systems Affected
Microsoft Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 Windows 8.1 for x64-based systems Affected
Microsoft Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 Windows RT 8.1 Affected
Microsoft Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 Windows Server 2008 R2 for x64-based Systems Service Pack 1 Affected
Microsoft Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) Affected
Microsoft Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 Windows Server 2012 Affected
Microsoft Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 Windows Server 2012 (Server Core installation) Affected
Microsoft Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 Windows Server 2012 R2 Affected
Microsoft Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 Windows Server 2012 R2 (Server Core installation) Affected
Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1803 for 32-bit Systems unspecified Affected
Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1803 for x64-based Systems unspecified Affected
Microsoft Microsoft .NET Framework 4.8 on Windows Server, version 1803 (Server Core Installation) unspecified Affected
Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1709 for 32-bit Systems unspecified Affected
Published
14 Jul 2020
Exploitation Reported
03 Nov 2021
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required

Tags

microsoft metasploit dotnet cisa windows

CVE References

Exploitation evidence

Why KEV Intelligence marks this CVE as exploited

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploited in the wild

CISA

Recorded 03 Nov 2021

Independent exploitation attestation added to the KEV Intelligence record.

Active exploitation observed

KEV Intelligence sensor

First observed 23 Jul 2026

First-party sensor telemetry confirms matching exploitation attempts.

Proof of concept available

Recorded 28 Apr 2025

Public scanner or PoC coverage increases practical exploitability.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the KEV Intelligence Pro API.

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Source Added
CISA First 2021-11-03 00:00 UTC
KEV Intelligence 2026-08-09 12:26 UTC

Operational indicators for this CVE are listed under Detection.

Sensor telemetry

First-party evidence of exploitation activity

Aggregate observations show the scale, recency, and distribution of activity without overstating sparse data.

4

Attempts observed

1

Unique attacker IPs

1

Attacker countries

US

1

Sensors observed

Exploitation attempts over the last 29 days

Daily events observed by KEV Intelligence sensors

Updated 19 Aug 2026

0
2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
2
0
0
0
0
0
0
0
0
0
0
0
0
22 Jul 28 Jul 3 Aug 9 Aug 19 Aug

First observed 23 Jul 2026 · Last observed 07 Aug 2026

Pro adds sensor region and window summaries. Enterprise adds raw IPs, paths, User-Agents, and payloads.

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Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets
2
User-Agents
1

Raw values available in Pro and Enterprise.

Virtual patch status

No KEV Intelligence virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

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Attacker IP Indicators

Attacker IP indicators observed · available in Pro and Enterprise.

Sensor-derived attacker IP indicators are available to Pro and Enterprise accounts under Detection and through the Pro API.

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Scanner Artifacts

Scanner and exploit-framework references linked to this CVE.

Scanner Reference Detected
Metasploit https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/http/sharepoint_data_deserialization.rb 28 Apr 2025

Risk and context

Severity, weaknesses, and research context

CVSS v3.1

7.8 High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS

94.3%

All CVSS Scores

CVSS v3.1 7.8 High

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS v2.0 6.8 Medium

AV:N/AC:M/Au:N/C:P/I:P/A:P

Potential Proof of Concepts

These PoCs are unverified and could contain malware. Use at your own risk.

sharepoint_data_deserialization

metasploit · Created Unknown

Metasploit module for CVE-2020-1147

Timeline

From disclosure to observed exploitation

  1. Observed by KEV Intelligence sensors

    Evidence-backed exploitation signal

  2. Indicator of compromise added

    Indicators of compromise recorded

  3. Metasploit module available

    Exploit module available

  4. Public PoC available

    Public proof-of-concept code published

  5. Added to CISA KEV

    Listed in the CISA Known Exploited Vulnerabilities catalog

  6. CVE published

    Vulnerability disclosed publicly

  7. CVE ID reserved

    Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

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  • Evidence confidence and provenance
  • First-party sensor telemetry
  • PoC and scanner references
  • Affected versions and enrichment
  • Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2020-1147

Free JSON includes basic KEV fields 
{
  "cve_id": "CVE-2020-1147",
  "confidence": "Confirmed",
  "cvss_score": 7.8,
  "cvss_estimated": false,
  "epss_score": 0.94347,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": true
  },
  "sensor_telemetry": { "attempts": 4, "sensors": 1 }
}

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