CVE-2026-58277

Analyzed Analyzed - Analysis Complete

Improper Authorization in Microsoft Office SharePoint

Publication date: 2026-07-14

Last updated on: 2026-07-15

Assigner: Microsoft Corporation

Description

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

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-07-14

Last Modified

2026-07-15

Generated

2026-08-04

AI Q&A

2026-07-15

EPSS Evaluated

2026-08-02

NVD

CVE-2026-58277

EUVD

EUVD-2026-44282

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	sharepoint_server	2019
microsoft	sharepoint_server	2016

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-285	The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action.

Attack-Flow Graph

Executive Summary

This vulnerability is an improper authorization issue in Microsoft Office SharePoint. An authorized attacker can exploit it over a network to elevate their privileges.

Impact Analysis

An attacker could gain higher access levels than intended, potentially allowing them to view, modify, or delete sensitive data stored in SharePoint.

Compliance Impact

This vulnerability could lead to unauthorized access to personal or sensitive data, potentially violating GDPR, HIPAA, or other compliance requirements due to improper data exposure.

Mitigation Strategies

Apply the latest security updates from Microsoft for SharePoint as soon as possible to address the improper authorization issue.

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