CVE-2025-53786

high Microsoft
CVSS v3 Base Score
8.0
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
EPSS Score
0.1%
Exploitation probability in 30 days
Top 71% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
High
Privileges Required
High
User Interaction
None
Confidentiality
High
Integrity
High
Availability
High
Published: August 6, 2025 (281 days ago)
Last Modified: February 27, 2026
Vendor: Microsoft

Description

On April 18th 2025, Microsoft announced Exchange Server Security Changes for Hybrid Deployments and accompanying non-security Hot Fix. Microsoft made these changes in the general interest of improving the security of hybrid Exchange deployments. Following further investigation, Microsoft identified specific security implications tied to the guidance and configuration steps outlined in the April announcement. Microsoft is issuing CVE-2025-53786 to document a vulnerability that is addressed by taking the steps documented with the April 18th announcement. Microsoft strongly recommends reading the information, installing the April 2025 (or later) Hot Fix and implementing the changes in your Exchange Server and hybrid environment.

CWE

CWE-287

Affected Products

microsoft exchange server

References

🔗 msrc.microsoft.com