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TI-2026-72984 Aliases CVE-2026-88206GHSA-x6c3-m2ww-xchr

Server-side request forgery in Microsoft SharePoint enables privilege escalation

Priority LOW 36CWE-918Published · Updated

Key facts

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

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

Summary

Server-side request forgery in Microsoft SharePoint Server Subscription Edition from 16.0.0 before 16.0.20326.20190 lets an authorized attacker escalate privileges over a network. The flaw is tracked as CWE-918. The CVSS vector indicates high attack complexity and low privileges required.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

Server-side request forgery (ssrf) in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00573 47th percentileScored 2026-11-07
Fix Fixed Microsoft SharePoint Server Subscription Edition (Microsoft): 16.0.20326.20190

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

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 Subscription Edition16.0.0 to before 16.0.20326.2019016.0.20326.20190Patch availableCNA
  • Microsoft SharePoint Server Subscription Edition VendorMicrosoft Affected 16.0.0 to before 16.0.20326.20190 Fixed in 16.0.20326.20190 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:microsoft:sharepoint_server:*:*:*:*:subscription:*:*:*before 16.0.20326.20190VulnerableMicrosoft
  • cpe:2.3:a:microsoft:sharepoint_server:*:*:*:*:subscription:*:*:* Versions before 16.0.20326.20190 Vulnerable ·Microsoft

Remediation

Microsoft SharePoint Server Subscription Edition is fixed in 16.0.20326.20190.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA Microsoft SharePoint Server Subscription Edition (Microsoft) Fixed in 16.0.20326.20190

Timeline

  1. 2026-10-13 Threatist record created from CVE-2026-88206
  2. 2026-10-13 Alias added: GHSA-x6c3-m2ww-xchr

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