M365 Change Tracker

← All changes · security · CVE-2026-78515

CVE-2026-78515ImportantMonitor

Microsoft Office Excel Information Disclosure Vulnerability

Severity Important  ·  Urgency Monitor

Why it matters: Important severity (CVSS 6.5)

Information Disclosure · Important · CVSS 6.5. Affects: Microsoft Office 365 for Mac, Microsoft Office, Microsoft 365 Apps, Microsoft Office LTSC for Mac, Microsoft Office LTSC.

CVSS 6.5Security update published 2026-09-08Applies to Cloud + on-premisesKB5002916NVD

Affected: Microsoft Office 365 for Mac, Microsoft Office, Microsoft 365 Apps, Microsoft Office LTSC for Mac, Microsoft Office LTSC

Related changes

Change history

2026-09-08 · First captured by tracker

View at Microsoft →