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CVE-2026-56157ImportantMonitor

Microsoft SharePoint Server Spoofing Vulnerability

Severity Important  ·  Urgency Monitor

Why it matters: Important severity (CVSS 5.4)

Spoofing · Important · CVSS 5.4. Affects: SharePoint Server.

CVSS 5.4EPSS 0.4%Security update published 2026-08-21Applies to On-premisesKB5002891NVD

Affected: SharePoint Server

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