CVE-2025-49706

Microsoft SharePoint Improper Authentication

6.5 MEDIUMActively exploited (CISA KEV)Used in ransomwareEPSS 99.1%

Published8 Jul 2025
Added to CISA KEV22 Jul 2025
Remediation due23 Jul 2025

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.

Added to KEV: 22 Jul 2025Federal remediation due: 23 Jul 2025Used in ransomware

Description

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

CVSS 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

ScopeUnchanged

ConfidentialityLow

IntegrityLow

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Affected products

Microsoft SharePoint Enterprise Server2016

Microsoft SharePoint Server2019 · < 16.0.18526.20424

Remediation

Fixed in

Microsoft SharePoint Server≥ 16.0.18526.20424

Patch & vendor advisories

References

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

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

Frequently asked

Is CVE-2025-49706 being actively exploited?

Yes. CVE-2025-49706 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 22 Jul 2025. It has been used in ransomware campaigns.

How severe is CVE-2025-49706?

CVE-2025-49706 has a CVSS 3.1 base score of 6.5, rated medium. EPSS estimates a 99.1% probability of exploitation.

Which products are affected by CVE-2025-49706?

Affected products include Microsoft SharePoint Enterprise Server, Microsoft SharePoint Server.

How do I fix CVE-2025-49706?

Upgrade affected software to a fixed version, for example Microsoft SharePoint Server 16.0.18526.20424 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-49706 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, a risk for it never ranks below high, and the update that fixes it moves to the Emergency patch lane. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.