CVE-2026-56164

Microsoft SharePoint Server Elevation of Privilege Vulnerability

State: Published
Severity: 5.3 Medium
Published: Jul 14, 2026
Updated: Nov 1, 2026
Reserved: Jun 19, 2026

Description

Missing authentication for critical function in Microsoft Office SharePoint allows an unauthorized attacker to elevate privileges over a network.

Scores

CVSS	Score	Vector	Source
3.1	5.3 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:F/RL:O/RC:C	microsoft

Weaknesses

CWE-306 Missing Authentication for Critical Function

Affected Products

Product	Versions
Microsoft SharePoint Enterprise Server 2016Microsoft	16.0.0 to before 16.0.5561.1001Affected
Microsoft SharePoint Server 2019Microsoft	16.0.0 to before 16.0.10417.20175Affected
Microsoft SharePoint Server Subscription EditionMicrosoft	16.0.0 to before 16.0.19725.20434Affected

References

Microsoft SharePoint Server Elevation of Privilege Vulnerabilityvendor-advisorypatch
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-56164government-resource

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