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CVE-2025-49706

Microsoft SharePoint Server Spoofing Vulnerability

MEDIUM
6.5
CVSS Score
Published: July 8, 2025 at 04:58 PM UTC
Updated: August 4, 2026 at 05:35 AM UTC
5 products affected across 1 vendorSharePoint ServerSharePoint Enterprise ServerSharePoint Server 2019

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Severity
MEDIUM6.5
Exploitation
CISA KEV
Exploit prediction
EPSS 99%
SSVC
Active

Actively Exploited

CISA Known Exploited Vulnerabilities (KEV) Catalog

EPSS Score99.1%

EPSS (Exploit Prediction Scoring System) estimates a 99.1% chance this CVE is exploited in the wild within the next 30 days — higher than 100% of all CVEs. It complements CVSS: a high EPSS on a mid-severity CVE can still be urgent.

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.
Ransomware Use
Known
Added to KEV
Jul 22, 2025
Remediation Due
Jul 23, 2025
460 days overdue
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

Description

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

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

SharePoint Enterprise Server· Microsoft
95%
2016
SharePoint Server· Microsoft
95%
v < 16.0.18526.2042416.0.0 ≤ v < 16.0.18526.204242019
Affected range stops below 16.0.18526.20424, so it looks safe — our inference, not a vendor statement
SharePoint Enterprise Server 2016· Microsoft
60%
16.0.0 ≤ v < 16.0.5508.100016.0.0
Affected range stops below 16.0.5508.1000, so it looks safe — our inference, not a vendor statement
SharePoint Server 2019· Microsoft
60%
16.0.0 ≤ v < 16.0.10417.2002716.0.0
Affected range stops below 16.0.10417.20027, so it looks safe — our inference, not a vendor statement
SharePoint Server Subscription Edition· Microsoft
60%
16.0.0 ≤ v < 16.0.18526.2042416.0.0
Affected range stops below 16.0.18526.20424, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

Vendor AdvisoryPatch
Source: [email protected]
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-49706
Press/Media CoverageVendor Advisory
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
https://www.microsoft.com/en-us/security/blog/2025/07/22/disrupting-active-exploitation-of-on-premises-sharepoint-vulnerabilities/
US Government Resource
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-49706

SSVC — Action Prioritization

SSVCActiveNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMmicrosoft
Vector?

Quick Info

StatusANALYZED
CWE
CWE-287

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