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Microsoft Security Response CenterCVE-2026-58277

Microsoft SharePoint Elevation of Privilege Vulnerability

HighVendor CVSS 8.8 / 10 1 CVE Published Jul 14, 2026 at 7:00 AM UTC

Summary

Improper authorization in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.

Products covered

  • Microsoft SharePoint Enterprise Server 2016

  • Microsoft SharePoint Server 2019

Remediation

Install KB5002891. Install KB5002883.

Vendor-listed fixes

  • 16.0.5561.1001

  • 16.0.10417.20175

CVEs in this advisory 1

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. Confirmed at the source

    Our collector saw this advisory during a later source check.