CVE-2026-70355

Microsoft SharePoint Server Elevation of Privilege Vulnerability

State: Published
Severity: 7.3 High
Published: Aug 11, 2026
Updated: Oct 30, 2026
Reserved: Aug 4, 2026

Description

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

Scores

CVSS	Score	Vector	Source
3.1	7.3 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N	microsoft

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected Products

Product	Versions
Microsoft SharePoint Server 2019Microsoft	16.0.0 to before 16.0.10417.20198Affected
Microsoft SharePoint Server Subscription EditionMicrosoft	16.0.0 to before 16.0.19725.20522Affected

References

Microsoft SharePoint Server Elevation of Privilege Vulnerabilityvendor-advisorypatch

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