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CVE-2026-55020ImportantMonitor

Microsoft SharePoint Server Spoofing Vulnerability

Severity Important  ·  Urgency Monitor

Why it matters: Important severity (CVSS 4.6)

Spoofing · Important · CVSS 4.6. Affects: SharePoint Server.

CVSS 4.6EPSS 0.4%Security update published 2026-08-21Applies to On-premisesKB5002891NVD

Affected: SharePoint Server

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