CVE-2025-49706
Published: July 22, 2025
Official Description
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.
CISA KEV Advisory
Microsoft SharePoint Improper Authentication Vulnerability
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.
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.
Risk Analysis
Microsoft SharePoint has an improper authentication vulnerability that enables an authorized attacker to spoof users over a network, potentially viewing and altering sensitive information. This vulnerability, with an EPSS score of 0.65002 and confirmed in-the-wild exploitation, is critical, especially as it can be chained with other vulnerabilities and has a patch bypass (CVE-2025-53771).
This vulnerability is actively exploited in the wild and is listed in CISA's KEV catalog. Its network-based nature implies it is remotely exploitable.
Apply the security updates for CVE-2025-53771, which provides more robust protection than the initial patch for CVE-2025-49706. Ensure all SharePoint installations are fully patched and authentication mechanisms are properly configured.
Technical Analysis
CVE-2025-49706 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2025-49706 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Affected Vendors & Products
Exploit & PoC Resources
All References (3)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2025-49706 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1