CVE-2026-102866

Microsoft · Published October 13, 2026

8.1

CVSS v3.1

HIGH

Patch availableGet patch

Description

Microsoft Office SharePoint Elevation of Privilege Vulnerability. Improper verification of cryptographic signature in Microsoft Office SharePoint allows an unauthorized attacker to elevate privileges over a network.

Affected Products

Microsoft SharePoint Server Subscription Edition

CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C