Read the docs
TI-2026-72286 Aliases CVE-2026-70217GHSA-xw63-c8vr-8cc7

Improper access control in Microsoft SharePoint exposes information

Priority LOW 24CWE-284Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-284.

Summary

Improper access control in Microsoft SharePoint Server Subscription Edition from 16.0.0 before 16.0.20326.20190 lets an authorized attacker disclose information over a network. The flaw is tracked as CWE-284. An attacker needs high privileges and no user interaction, and the impact is limited to high confidentiality loss.

Written with Claude Haiku 5.5 from the sources below · 2026-10-27

Description from the CNA

Improper access control in Microsoft Office SharePoint allows an authorized attacker to disclose information over a network.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00971 62nd 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
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 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. Builds from 16.0.0 before 16.0.20326.20190 are affected.

Written with Claude Haiku 5.5 from the sources below · 2026-10-27

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

Timeline

  1. 2026-10-13 Threatist record created from CVE-2026-70217
  2. 2026-10-13 Alias added: GHSA-xw63-c8vr-8cc7
  3. 2026-10-13 CISA SSVC decision points changed

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