What is CVE-2026-45484?

CVE-2026-45484 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. Microsoft SharePoint Elevation of Privilege Vulnerability

Which CVE IDs does CVE-2026-45484 cover?

CVE-2026-45484 covers the following CVE IDs: CVE-2026-45484. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-45484?

CVE-2026-45484 has a CVSS v3 base score of 8.8, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-45484?

CVE-2026-45484 affects 3 products, including: Microsoft SharePoint Enterprise Server 2016; Microsoft SharePoint Server 2019; Microsoft SharePoint Server Subscription Edition.

CVE-2026-45484HighCVSS 8.8

Microsoft SharePoint Elevation of Privilege Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

June 10, 2026

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2026-45484 →

📋 Description

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

🎯 Affected products3

Microsoft SharePoint Enterprise Server 2016
Microsoft SharePoint Server 2019
Microsoft SharePoint Server Subscription Edition

✅ Remediation

KB5002880 (Security Update) — fixed build 16.0.5556.1005 KB5002874 (Security Update) — fixed build 16.0.10417.20153 KB5002873 (Security Update) — fixed build 16.0.19725.20384

🔗 References (7)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45484
patchhttps://www.microsoft.com/en-us/download/details.aspx?id=108696
referencehttps://support.microsoft.com/help/5002880
patchhttps://www.microsoft.com/en-us/download/details.aspx?id=108694
referencehttps://support.microsoft.com/help/5002874
patchhttps://www.microsoft.com/en-us/download/details.aspx?id=108692
referencehttps://support.microsoft.com/help/5002873