CVE-2026-70321

Microsoft SharePoint Remote Code Execution Vulnerability

CVE-2026-70321 is fixed in Microsoft SharePoint Server Subscription Edition on 1 platform by KB5002893 (version ), released August 11, 2026. It is not reported as exploited. Patch Radar priority: High.

High

CVSS

8.8

Important

Exploitation

None reported

Exploitation Less Likely

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0169

77th percentile

<p>Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.</p>

Where it's fixed

Product	Fixed in	Fix	Released
Microsoft
Microsoft SharePoint Server Subscription Edition		KB5002893	Aug 11, 2026

Details

Published
August 11, 2026
Weakness
Deserialization of Untrusted Data
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70321

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