CVE-2026-62839

Analyzed Analyzed - Analysis Complete

Insufficient Credential Protection Leads to Spoofing in Microsoft Office SharePoint

Publication date: 2026-08-11

Last updated on: 2026-08-13

Assigner: Microsoft Corporation

Description

Insufficiently protected credentials in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-08-11

Last Modified

2026-08-13

Generated

2026-09-01

AI Q&A

2026-08-12

EPSS Evaluated

2026-08-30

NVD

CVE-2026-62839

EUVD

EUVD-2026-56776

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	sharepoint_server	2019
microsoft	sharepoint_server	2016
microsoft	sharepoint_server	to 16.0.19725.20522 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-522	The product transmits or stores authentication credentials, but it uses an insecure method that is susceptible to unauthorized interception and/or retrieval.

Attack-Flow Graph

Executive Summary

This vulnerability involves insufficiently protected credentials in Microsoft Office SharePoint. An authorized attacker can exploit this to perform spoofing over a network, potentially impersonating legitimate users or services.

Impact Analysis

An attacker could impersonate users or services, leading to unauthorized access, data breaches, or misleading communications. This could result in loss of sensitive information or compromised system integrity.

Compliance Impact

This vulnerability may lead to unauthorized access to personal or sensitive data, violating GDPR and HIPAA requirements for data protection and access controls. Non-compliance could result in legal penalties or reputational damage.

Mitigation Strategies

Apply the latest security updates from Microsoft for SharePoint as soon as possible to address insufficiently protected credentials.

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