M365 Change Tracker

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CVE-2026-45455ImportantMonitor

Microsoft Excel Information Disclosure Vulnerability

Severity Important  ·  Urgency Monitor

Why it matters: Important severity (CVSS 3.3)

Information Disclosure · Important · CVSS 3.3. Affects: Office Online Server, Microsoft Office, Microsoft 365 Apps, Microsoft Office LTSC for Mac, Microsoft Office LTSC, Microsoft Excel.

CVSS 3.3EPSS 0.6%Security update published 2026-09-02Applies to Cloud + on-premisesKB5002875NVD

Affected: Office Online Server, Microsoft Office, Microsoft 365 Apps, Microsoft Office LTSC for Mac, Microsoft Office LTSC, Microsoft Excel

Related changes

Change history

2026-09-02 · First captured by tracker

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