CVE-2026-88164 Microsoft Office SharePoint - Privilege Escalation

Microsoft Office SharePoint contains a broken access control caused by missing authorization checks, letting authorized attackers elevate privileges over a network, exploit requires attacker to be authorized.

CVSS base score 8.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
View the NVD record ↗

Details

Type
Privilege Escalation
Impact
Privilege Escalation
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
14 October 2026
Updated
15 October 2026
Weakness
CWE-862

Vendor fix

Update to the latest version of Microsoft Office SharePoint.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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