CVE-2025-49706: Microsoft SharePoint Improper Authentication Vulnerability

CISA Known Exploited Vulnerabilities

Name

Microsoft SharePoint Improper Authentication Vulnerability

Vendor

Microsoft

Product

SharePoint

Added to the catalog

2025-07-22

Due date for US federal agencies

2025-07-23

Weaknesses

CWE-287

Catalog version

2026.10.30

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 (CISA)

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.

Ransomware use: CISA marks this vulnerability as known to be used in ransomware campaigns. CISA does not say which group used it.

Links in CISA's notes

• 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

Read on 2026-11-02T23:39:54.475Z under licence cisa-kev-cc0@b0067899 from https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

NVD analysis

Status

Analyzed

Published

2025-07-08T17:15:58.250

Last modified

2026-08-04T05:16:34.723

Weaknesses

CWE-287

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

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-49706 (Vendor Advisory)
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-49706 (US Government Resource)
• https://www.microsoft.com/en-us/security/blog/2025/07/22/disrupting-active-exploitation-of-on-premises-sharepoint-vulnerabilities/ (Press/Media Coverage, Vendor Advisory)

This product uses the NVD API but is not endorsed or certified by the NVD.

Read on 2026-11-02T23:42:22.836Z under licence nvd-api-terms-of-use@ff2a5288 from https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2025-49706

CVE record

Title (CNA)

Microsoft SharePoint Server Spoofing Vulnerability

Assigner

microsoft

State

PUBLISHED

Published

2025-07-08T16:58:07.343Z

Updated

2026-08-04T03:55:53.894Z

Problem types

CWE-287: Improper Authentication

References

• Microsoft SharePoint Server Spoofing Vulnerability

Read on 2026-11-03T02:17:02.084Z under licence cve-terms-of-use@81bfa2f3 from https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2025/49xxx/CVE-2025-49706.json

Defensive techniques (MITRE D3FEND)

D3FEND maps these defensive techniques to the weakness (CWE) that NVD lists for this CVE, through the digital artifacts the weakness affects. D3FEND does not say they stop this vulnerability.

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