cve-2026-45454

CVE-2026-45454 is a Microsoft SharePoint Remote Code Execution vulnerability disclosed in Microsoft's June 9, 2026 Security Update Guide. The tag covers discussions on patch-management priorities for on-premises SharePoint administrators, emphasizing that SharePoint remains a high-value target in Windows estates due to its role in document management, identity, workflow, and legacy customizations. The advisory carries high confidence from Microsoft, with significant technical detail implied. For organizations running SharePoint outside Microsoft 365, this vulnerability underscores the need for timely patching to mitigate RCE risks in server-side collaboration infrastructure.