CVE-2026-47634

Microsoft SharePoint Server Spoofing Vulnerability

CVE-2026-47634 is fixed in 2 products on 1 platform, first by KB5002874, released June 9, 2026. It is not reported as exploited, but the vendor rates exploitation more likely. Patch Radar priority: Urgent.

Urgent

CVSS

7.3

Important

Exploitation

More likely

Vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0051

44th percentile

<p>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.</p>

Where it's fixed

Product	Fix	Released
Microsoft
Microsoft SharePoint Server 2019	KB5002874	Jun 9, 2026
Microsoft SharePoint Server Subscription Edition	KB5002873	Jun 9, 2026

Details

Published
June 9, 2026
Weakness
Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47634

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