CVE-2026-45453

Medium

Description

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.

SeverityMedium

CVSS5.4

Exploit probability—

Product

Microsoft Sharepoint Server

PublishedJun 9, 2026

First seenJun 9, 2026

Weakness typeCWE-79Cross-site scripting (XSS)

How to fix

Update

microsoft sharepoint_server16.0.19725.20384 or later

Patches

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45453

Affected products

Product	Affected versions	Fixed in
microsoft sharepoint_server	v < 16.0.19725.20384, 2016, 2019	16.0.19725.20384

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