CVE-2026-109454: critical vulnerability in Microsoft SharePoint Server Subscription Edition
Microsoft Office SharePoint Spoofing Vulnerability
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
25Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9
Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C
Affected products
Microsoft · Microsoft SharePoint Server Subscription EditionRelated CVEs — Microsoft SharePoint Server Subscription Edition
In the same product, most dangerous first.
CVE-2025-53770CRITICALMicrosoft SharePoint Server Remote Code Execution VulnerabilityEPSS 100.0%KEVCVE-2025-49706MEDIUMMicrosoft SharePoint Server Spoofing VulnerabilityEPSS 99.1%KEVCVE-2023-24955HIGHMicrosoft SharePoint Server Remote Code Execution VulnerabilityEPSS 85.0%KEVCVE-2026-45659HIGHMicrosoft SharePoint Remote Code Execution VulnerabilityEPSS 80.2%KEVCVE-2026-55040CRITICALMicrosoft SharePoint Server Security Feature Bypass VulnerabilityEPSS 69.5%KEVCVE-2024-38094HIGHMicrosoft SharePoint Remote Code Execution VulnerabilityEPSS 50.9%KEV