Missing Authorization in Microsoft SharePoint Server - CVE-2026-109495
Published: November 10, 2026
Vulnerability identifier: #VU164746
CSH Severity: Low
CVSS v4: 7.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-109495
CWE-ID: CWE-862
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote privileged user to escalate privileges.
The vulnerability exists due to missing authorization in Microsoft Office SharePoint when handling network requests. A remote privileged user can submit requests that exploit missing authorization checks to escalate privileges.
Affected software
Microsoft SharePoint Server
How to mitigate CVE-2026-109495
Install security update from vendor's website.
Microsoft SharePoint Server - update to 16.0.20326.20278