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Microsoft Security Response CenterCVE-2026-45465

Microsoft SharePoint Server Spoofing Vulnerability

HighVendor CVSS 5.4 / 10 1 CVE Published Jun 9, 2026 at 7:00 AM UTC

Summary

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

Products covered

  • Microsoft SharePoint Enterprise Server 2016

  • Microsoft SharePoint Server 2019

  • Microsoft SharePoint Server Subscription Edition

Remediation

Install KB5002880. Install KB5002874. Install KB5002873.

Vendor-listed fixes

  • 16.0.5556.1005

  • 16.0.10417.20153

  • 16.0.19725.20384

CVEs in this advisory 1

Update history

What changed in later vendor updates

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    • The vendor changed the advisory's last-updated date.

Updates

  1. Published by Microsoft Security Response Center

    The publication date reported by the vendor.

  2. Added to SecurityAlert

    We collected the advisory from the official source.

  3. Updated by Microsoft Security Response Center

    The vendor changed the advisory after it was first published.

  4. Confirmed at the source

    Our collector saw this advisory during a later source check.