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TI-2021-16228 Aliases CVE-2021-38651GHSA-xq9r-6v4r-3g8m

Microsoft SharePoint Server Spoofing Vulnerability

Priority LOW 36Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
Spoofing
Confidentiality · integrity · availability
High · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from Microsoft.

Summary

Microsoft SharePoint Server Spoofing Vulnerability

Why it matters now

EPSS 0.01335 71st percentileScored 2026-11-07
Fix Fixed Microsoft SharePoint Enterprise Server 2016 (Microsoft): 5215.1000Microsoft SharePoint Foundation 2013 Service Pack 1 (Microsoft): 5381.1000+1 more product

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
MicrosoftMicrosoft SharePoint Enterprise Server 201616.0.0 to before 5215.10005215.1000Patch availableCNA
MicrosoftMicrosoft SharePoint Foundation 2013 Service Pack 115.0.0 to before 5381.10005381.1000Patch availableCNA
MicrosoftMicrosoft SharePoint Server 201916.0.0 to before 10378.2000210378.20002Patch availableCNA
  • Microsoft SharePoint Enterprise Server 2016 VendorMicrosoft Affected 16.0.0 to before 5215.1000 Fixed in 5215.1000 Patch available CNA
  • Microsoft SharePoint Foundation 2013 Service Pack 1 VendorMicrosoft Affected 15.0.0 to before 5381.1000 Fixed in 5381.1000 Patch available CNA
  • Microsoft SharePoint Server 2019 VendorMicrosoft Affected 16.0.0 to before 10378.20002 Fixed in 10378.20002 Patch available CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:microsoft:sharepoint_enterprise_server:2016:*:*:*:*:*:*:*2016VulnerableMicrosoft
cpe:2.3:a:microsoft:sharepoint_foundation:2013:sp1:*:*:*:*:*:*2013 sp1VulnerableMicrosoft
cpe:2.3:a:microsoft:sharepoint_server:2019:*:*:*:*:*:*:*2019VulnerableMicrosoft
  • cpe:2.3:a:microsoft:sharepoint_enterprise_server:2016:*:*:*:*:*:*:* Versions 2016 Vulnerable ·Microsoft
  • cpe:2.3:a:microsoft:sharepoint_foundation:2013:sp1:*:*:*:*:*:* Versions 2013 sp1 Vulnerable ·Microsoft
  • cpe:2.3:a:microsoft:sharepoint_server:2019:*:*:*:*:*:*:* Versions 2019 Vulnerable ·Microsoft

Remediation

  • Fix · CNA Microsoft SharePoint Enterprise Server 2016 (Microsoft) Fixed in 5215.1000
  • Fix · CNA Microsoft SharePoint Foundation 2013 Service Pack 1 (Microsoft) Fixed in 5381.1000
  • Fix · CNA Microsoft SharePoint Server 2019 (Microsoft) Fixed in 10378.20002

Vendor assessments

Microsoft

Microsoft's page for this CVE →

Impact
Spoofing
Exploited
No
Publicly disclosed
No
Exploitability
Exploitation Less Likely
ProductStatusPlan or fix
Microsoft SharePoint Enterprise Server 2016Fixed 5215.1000 · Security Update
Microsoft SharePoint Foundation 2013 Service Pack 1Fixed 5381.1000 · Security Update
Microsoft SharePoint Server 2019Fixed 10378.20002 · Security Update

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-38651
  2. 2026-10-03 Alias added: GHSA-xq9r-6v4r-3g8m

References

Patch 2

  • TI-2019-00394 Improper input validation in Microsoft SharePoint Server KEVCVSS 3.1CRITICAL 9.8
  • TI-2020-01112 A remote code execution vulnerability exists in .NET Framework, Microsoft SharePoint, and… KEVCVSS 3.1HIGH 7.8
  • TI-2017-08774 Memory corruption in Microsoft Office KEVCVSS 3.1HIGH 7.8
  • TI-2023-10439 Microsoft SharePoint Server Remote Code Execution Vulnerability KEVCVSS 3.1HIGH 7.2
  • TI-2023-08100 Microsoft Word Remote Code Execution Vulnerability CVSS 3.1CRITICAL 9.8
  • TI-2025-31676 Microsoft SharePoint Server Spoofing Vulnerability KEVCVSS 3.1MEDIUM 6.5
See all 255 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences