CVE-2026-58277

Microsoft SharePoint Elevation of Privilege Vulnerability

CVE-2026-58277 is fixed in 2 products on 1 platform, first by KB5002891, released July 14, 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

0.0094

61st percentile

<p>Improper authorization in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.</p>

Where it's fixed

Product	Fix	Released
Microsoft
Microsoft SharePoint Enterprise Server 2016	KB5002891	Jul 14, 2026
Microsoft SharePoint Server 2019	KB5002883	Jul 14, 2026

Details

Published
July 14, 2026
Weakness
Improper Authorization
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58277

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