Risk Letters

Exploited vulnerability

CVE-2025-49706

TLP:CLEAR

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.

Facts

  • Vendor: Microsoft
  • Product: SharePoint
  • CVSS: 6.5
  • EPSS (probability of exploitation within 30 days): 99.1 %
  • On CISA's Known Exploited Vulnerabilities list since: 22 July 2025
  • First known exploitation: 22 July 2025
  • Used in ransomware campaigns (per CISA): Yes
  • CISA's deadline for US federal agencies: 23 July 2025
  • Weakness: CWE-287
  • First seen by Risk Letters: 22 July 2025

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Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD