Known exploited vulnerability
CVE-2025-49706
The short answer
CVE-2025-49706 affects Microsoft Microsoft SharePoint Enterprise Server 2016 and is rated medium (CVSS 6.5). CISA added it to the Known Exploited Vulnerabilities catalog on 2025-07-22: attackers are using it, so patch it first.
What it is
Improper authentication in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.
Weakness: CWE-287.
Severity
6.5 medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Exploited (CISA KEV)
Yes, since Jul 22, 2025
Federal due date Jul 23, 2025
EPSS, next 30 days
99%
Higher than 100% of scored CVEs
How it can be exploited
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- Low
- Integrity impact
- Low
- Availability impact
- None
What CISA says to do
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…
Affected products
Microsoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019, Microsoft SharePoint Server Subscription Edition. NVD's record lists the exact affected versions.
References
- msrc.microsoft.com/update-guide/vulnerability/CVE-2025-49706 Vendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-49706 US Government Resource
- www.microsoft.com/en-us/security/blog/2025/07/22/disrupting-active-exploitation-of-on-premises-sharepoint-vulnerabilities/ Press/Media CoverageVendor Advisory
Questions
Is CVE-2025-49706 being exploited?
Yes. CISA added CVE-2025-49706 to its Known Exploited Vulnerabilities catalog on 2025-07-22, with a federal remediation due date of 2025-07-23. CISA lists it as used in ransomware campaigns.
How do I fix CVE-2025-49706?
CISA's 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…
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.
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