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CVE-2026-64921CriticalMonitor

Microsoft SharePoint Server Elevation of Privilege Vulnerability

Severity Critical  ·  Urgency Monitor

Why it matters: Critical severity (CVSS 8.8)

Elevation of Privilege · Critical · CVSS 8.8. Affects: SharePoint Server.

CVSS 8.8EPSS 1.0%Security update published 2026-08-23Applies to On-premisesKB5002905NVD

Affected: SharePoint Server

Related changes

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