Incorrect authorization in Microsoft SharePoint Server - CVE-2026-120002
Published: November 11, 2026
Vulnerability identifier: #VU165410
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-120002
CWE-ID: CWE-863
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to elevate privileges and perform unauthorized actions on a connected business service using shared credentials.
The vulnerability exists due to incorrect authorization in Microsoft SharePoint Server when handling network requests. A remote user can send a specially crafted network request to cause SharePoint to perform unauthorized actions on a connected business service using shared credentials.
Exploitation requires site read access and membership in the relevant SharePoint Secure Store target application.
Affected software
Microsoft SharePoint Server
How to mitigate CVE-2026-120002
Install security update from vendor's website.
Microsoft SharePoint Server - update to 16.0.20326.20278