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CVE-2026-42831CriticalMonitor

Microsoft Office Remote Code Execution Vulnerability

Severity Critical  ·  Urgency Monitor

Why it matters: Critical severity (CVSS 7.8)

Remote Code Execution · Critical · CVSS 7.8. Affects: Microsoft Office LTSC for Mac, Microsoft Office for Android.

CVSS 7.8EPSS 0.4%Update published 2026-06-23Source updated 2026-06-23NVD

Affected: Microsoft Office LTSC for Mac, Microsoft Office for Android

Change history

2026-06-23 · First seen

View at Microsoft →