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Microsoft Security Response CenterCVE-2026-45483

Microsoft Office Project Server Spoofing Vulnerability

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

Read the vendor bulletin Get alerts for Microsoft SharePoint Server Subscription Edition
4.6CVSS out of 10High severity
Scope

What the vendor says is affected

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

Versions the vendor lists as fixed

  • 16.0.19725.20384
  • 16.0.5556.1005
  • 16.0.10417.20153
Next step

What the vendor recommends

Install KB5002873. Install KB5002880. Install KB5002874.

Review the complete instructions on the vendor's site
Timeline

When this advisory changed

  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.

Vulnerabilities

CVEs named in this advisory

CVE-2026-45483View CVSS, KEV, EPSS, and threat context
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