CVE-2025-49706 — Sharepoint Enterprise Server
MEDIUMCVE-2025-49706 is a medium-severity (CVSS 6.5) Improper Authentication vulnerability in microsoft sharepoint enterprise server. It is in CISA's Known Exploited Vulnerabilities catalog (added 2025-07-22) and has been used in ransomware campaigns — treat it as actively exploited and patch now. A fix is available — see the affected versions and patch details below.
Improper authentication in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.
Exploitation Status
Actively exploited in the wild
- Confirmed by CISA's Known Exploited Vulnerabilities catalog on 2025-07-22 — including use in ransomware campaigns. Federal agencies were required to remediate by 2025-07-23.
Exploitation and automatability from CISA (KEV catalog and SSVC triage) for CVE-2025-49706.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
CVE-2025-49706 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.
Where this sits among everything scored
Of 394,803 CVEs with a current EPSS score, this one falls in the ≥ 90% band (highlighted). Counts from FIRST.org, log-scaled.
Description
Improper authentication in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.
Affected Products
sharepoint enterprise servermicrosoftsharepoint servermicrosoftResearch use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
Detection & mitigation playbook
Vendor / applianceDetect
Inventory every microsoft sharepoint enterprise server deployment and check each version against the affected-products list above.
Fix
Apply the microsoft sharepoint enterprise server security patch or hotfix for CVE-2025-49706 on the affected version, following the vendor advisory for your exact build.
Workarounds
Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.
How to detect CVE-2025-49706
A community-maintained Nuclei template exists for this CVE. You can scan for it directly:
nuclei -id cve-2025-49706 -u https://target- Template
- Microsoft SharePoint Server - Authentication Bypass
- Severity
- medium
- Impact
- Unauthenticated attackers can spoof authentication by manipulating the Referer header to access ToolPane functionality, potentially enabling unauthorized actions on SharePoint sites.
- Remediation
- Apply the Microsoft security patches for SharePoint Server as described in the MSRC update guide.
Template by ProjectDiscovery nuclei-templates (daffainfo), MIT licensed. View the full template. Scan only systems you are authorised to test.
Frequently Asked Questions
Is CVE-2025-49706 being exploited in your environment?
Detect and block the exploit chain at execution, on systems you cannot patch yet.