CVE-2026-102861: Microsoft Office SharePoint Elevation of Privilege Vulnerability

Overview

Severity

High (CVSS 8.8)

CVSS Vector

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

Category

Elevation of Privilege

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2026-Oct

Released

2026-10-13

Description

Missing authorization in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.

FAQ

Is the Preview Pane an attack vector for this vulnerability? No, the Preview Pane is not an attack vector. What privileges could be gained by an attacker who successfully exploited this vulnerability? Successful exploitation could allow an attacker to run script in the security context of the affected SharePoint user and perform actions permitted to that user.

Affected Products (1)

Microsoft Office

• Microsoft SharePoint Server Subscription Edition

Security Updates (1)

• 5002927

Acknowledgments

<a href="https://www.linkedin.com/in/nguyen-hoang-quoc-an-009863267/">kayiz</a> with <a href="http://lp.com.vn/">Lien Phat Technology Corporation</a>

Revision History

• 2026-10-13: Information published.