CVE-2026-97783: Microsoft Office SharePoint Spoofing Vulnerability

Overview

Severity
High (CVSS 8.1)
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C
Category
Spoofing
Exploit Status
Not Exploited
Exploitation Likelihood
Less Likely
Patch Tuesday
2026-Oct
Released
2026-10-13

Description

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.

FAQ

How could an attacker exploit the vulnerability? An attacker who successfully exploited this vulnerability might be able to run their scripts in the security context of the current user by enticing the user to click on a link resulting in a cross-site scripting attack on the SharePoint Server.

Affected Products (1)

Microsoft Office

  • Microsoft SharePoint Server 2019

Acknowledgments

Bui Xuan Quang (buxu) with Ncsgroup.vn

Revision History

  • 2026-10-13: Information published.