CVE WatchAug 4, 2026

CVE-2025-49706

Microsoft SharePoint Improper Authentication Vulnerability

CVSS

6.5

Medium

EPSS

99.1%

p100

KEV

YES

Jul 22, 2025

Exploit Today

0-100

Published: Jul 8, 2025 · Last modified: Aug 4, 2026 · CWE-287

EPSS · 30d

99.1%EPSS · 30 days99.1%

2026-09-162026-10-14

KEV catalog record

Product

Microsoft / SharePoint

Vulnerability

Microsoft SharePoint Improper Authentication Vulnerability

Added to KEV

Jul 22, 2025

Remediate by

Jul 23, 2025

Known ransomware use

Yes

Summary description

Microsoft SharePoint contains an improper authentication vulnerability that allows an authorized attacker to perform spoofing over a network. Successfully exploitation could allow an attacker to view sensitive information and make some changes to disclosed information. This vulnerability could be chained with CVE-2025-49704. CVE-2025-53771 is a patch bypass for CVE-2025-49706, and the updates for CVE-2025-53771 include more robust protection than those for CVE-2025-49706.

Required action

Disconnect public-facing versions of SharePoint Server that have reached their end-of-life (EOL) or end-of-service (EOS) to include SharePoint Server 2013 and earlier versions. For supported versions, please follow the mitigations according to CISA (URL listed below in Notes) and vendor instructions (URL listed below in Notes). Adhere to the applicable BOD 22-01 guidance for cloud services or discontinue use of the product if mitigations are not available.

Notes

CISA Mitigation Instructions: https://www.cisa.gov/news-events/alerts/2025/07/20/microsoft-releases-guidance-exploitation-sharepoint-vulnerability-cve-2025-53770 ; https://www.microsoft.com/en-us/security/blog/2025/07/22/disrupting-active-exploitation-of-on-premises-sharepoint-vulnerabilities/ ; https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-49706 ; https://nvd.nist.gov/vuln/detail/CVE-2025-49706

Technical description

Improper authentication in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.

Official references

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