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CVE-2026-65801CriticalMonitor

Microsoft Exchange Online Elevation of Privilege Vulnerability

Severity Critical  ·  Urgency Monitor

Why it matters: Critical severity (CVSS 10)

Elevation of Privilege · Critical · CVSS 10. Affects: Exchange Server.

CVSS 10EPSS 0.5%Security update published 2026-08-23Applies to On-premisesNVD

Affected: Exchange Server

Related changes

Change history

2026-08-20 · First captured by tracker

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