HIGH 8.4 Microsoft
CVE-2026-45456
Microsoft Outlook and Word Remote Code Execution Vulnerability
Microsoft Security Update 2026-Jun: Microsoft Outlook and Word Remote Code Execution Vulnerability
Affected Products
- Microsoft Office 365 for Mac
- Microsoft SharePoint Enterprise Server 2016
- Microsoft SharePoint Server 2019
- Microsoft Office 2019 for 32-bit editions
- Microsoft Office 2019 for 64-bit editions
- Microsoft 365 Apps for Enterprise for 32-bit Systems
- Microsoft 365 Apps for Enterprise for 64-bit Systems
- Microsoft Office LTSC for Mac 2021
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45456
- https://nvd.nist.gov/vuln/detail/CVE-2026-45456
This high severity vulnerability with a CVSS score of 8.4 was published on 2026-06-09 via Microsoft. Affected: Microsoft Office 365 for Mac, Microsoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019 and 5 more.
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