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Critical vulnerability

Critical vulnerability in Microsoft SharePoint Server Subscription Edition (CVE-2026-109454)

Microsoft SharePoint Server Subscription Edition · Servers and applications

CVE-2026-109454

Microsoft Office SharePoint Spoofing Vulnerability

Severity
Critical 9.0
Published
10 Nov 2026
Fixed in
16.0.20326.20278
SoftwareAffected versions
Microsoft SharePoint Server Subscription EditionServers and applications
  • From 16.0.0 before 16.0.20326.20278
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-109454
Everything about CVE-2026-109454

From NVD, the CVE Program, OSV.dev with the GitHub Advisory Database, WPVulnerability, WordPress's security advisories and CISA's Known Exploited Vulnerabilities catalog, as they stood when this was written. Each vulnerability's own page has its latest rating and fix. This product uses the NVD API but is not endorsed or certified by the NVD.