PT-2026-47966 · Microsoft · Sharepoint Enterprise Server 2016+2

Published 2026-06-09 · Updated 2026-06-09 · CVE-2026-45484

Mitre

CVSS v3.1

8.8

High

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.

Fix

Deserialization of Untrusted Data

Weakness Enumeration

CWE-502

Related Identifiers

CVE-2026-45484

Affected Products

Sharepoint Enterprise Server 2016

Sharepoint Server 2019

Sharepoint Server Subscription Edition

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-45484 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45484 · Vendor Advisory