CVE-2026-70306

Microsoft Office SharePoint Spoofing Vulnerability

CVE-2026-70306 is fixed in 3 products on 1 platform, first by KB5002905, released August 11, 2026. It is not reported as exploited. Patch Radar priority: High.

High

CVSS

9.3

Important

Exploitation

None reported

Exploitation Less Likely

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0101

63rd percentile

<p>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.</p>

Where it's fixed

Product	Fix	Released
Microsoft
Microsoft SharePoint Enterprise Server 2016	KB5002905	Aug 11, 2026
Microsoft SharePoint Server 2019	KB5002894	Aug 11, 2026
Microsoft SharePoint Server Subscription Edition	KB5002893	Aug 11, 2026

Details

Published
August 11, 2026
Weakness
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70306

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