CVE-2026-45458CriticalMonitor
Microsoft Outlook and Word Remote Code Execution Vulnerability
Severity Critical · Urgency Monitor
Why it matters: Critical severity (CVSS 8.4)
Remote Code Execution · Critical · CVSS 8.4. Affects: Microsoft Office 365 for Mac, SharePoint Server, Microsoft Office, Microsoft 365 Apps, Microsoft Office LTSC for Mac, Microsoft Office LTSC.
Affected: Microsoft Office 365 for Mac, SharePoint Server, Microsoft Office, Microsoft 365 Apps, Microsoft Office LTSC for Mac, Microsoft Office LTSC
Change history
2026-06-23 · First seen