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TI-2021-17530 Aliases CVE-2021-40483GHSA-vfcg-x845-wx2v

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
—
Confidentiality · integrity · availability
High · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

Microsoft SharePoint Server Spoofing Vulnerability

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01378 72nd percentileScored 2026-11-07
Fix Fixed Microsoft SharePoint Server 2019 (Microsoft): 16.0.10379.20000

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MicrosoftMicrosoft SharePoint Server 201916.0.0 to before 16.0.10379.2000016.0.10379.20000Patch availableCNA
  • Microsoft SharePoint Server 2019 VendorMicrosoft Affected 16.0.0 to before 16.0.10379.20000 Fixed in 16.0.10379.20000 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:microsoft:sharepoint_server:2019:*:*:*:*:*:*:*2019VulnerableMicrosoft
  • cpe:2.3:a:microsoft:sharepoint_server:2019:*:*:*:*:*:*:* Versions 2019 Vulnerable ·Microsoft

Remediation

  • Fix · CNA Microsoft SharePoint Server 2019 (Microsoft) Fixed in 16.0.10379.20000

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-40483
  2. 2026-10-03 Alias added: GHSA-vfcg-x845-wx2v

References

Patch 1

  • TI-2026-42212 Microsoft SharePoint Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-37256 Microsoft SharePoint Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-16982 Microsoft SharePoint Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-33671 Microsoft SharePoint Server Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-13749 Microsoft SharePoint Server Elevation of Privilege Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2019-00394 Improper input validation in Microsoft SharePoint Server KEVCVSS 3.1CRITICAL 9.8
See all 631 →

Sources

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