What is CVE-2026-88204?

CVE-2026-88204 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. Microsoft Office SharePoint Spoofing Vulnerability

Which CVE IDs does CVE-2026-88204 cover?

CVE-2026-88204 covers the following CVE IDs: CVE-2026-88204. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-88204?

CVE-2026-88204 has a CVSS v3 base score of 7.3, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-88204?

CVE-2026-88204 affects 1 product, including: Microsoft SharePoint Server Subscription Edition.

CVE-2026-88204HighCVSS 7.3

Microsoft Office SharePoint Spoofing Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

October 13, 2026

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2026-88204 →

📋 Description

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

🎯 Affected products1

Microsoft SharePoint Server Subscription Edition

✅ Remediation

KB5002927 (Security Update) — fixed build 16.0.20326.20190

🔗 References (3)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88204
patchhttps://www.microsoft.com/en-us/download/details.aspx?id=108862
referencehttps://support.microsoft.com/help/5002927