What’s Vulnerable › Vulnerabilities

CVE-2026-47634: Microsoft SharePoint Server Spoofing Vulnerability

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-09 · updated 2026-09-24
• Weakness: CWE-74

Description

Improper neutralization of special elements in output used by a downstream component ('injection') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.

Affected products

• Microsoft SharePoint Server: before 16.0.19725.20384; 2019 — fixed in 16.0.19725.20384
• Microsoft SharePoint Server Subscription Edition: from 16.0.0 before 16.0.19725.20384 — fixed in 16.0.19725.20384
• Microsoft SharePoint Server: from 16.0.0 before 16.0.10417.20153 — fixed in 16.0.10417.20153

How to fix

Upgrade to a fixed version: Microsoft SharePoint Server 16.0.19725.20384; Microsoft SharePoint Server Subscription Edition 16.0.19725.20384; Microsoft SharePoint Server 16.0.10417.20153. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47634

Get alerted when CVE-2026-47634 or the next vulnerability affects your stack