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CVE-2026-118153ImportantMonitor

Microsoft Exchange Server Denial of Service Vulnerability

Severity Important  ·  Urgency Monitor

Why it matters: Important severity (CVSS 7.5)

Denial of Service · Important · CVSS 7.5. Affects: Exchange Server.

CVSS 7.5Security update published 2026-11-11Applies to On-premisesKB5133453NVD

Affected: Exchange Server

Related changes

Change history

2026-11-10 · First captured by tracker

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