CVE-2025-53786

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.

Risk Information

Base Score

8.0

MODERATE

Vector

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

EPSS Score

Exploitation Probability

0.109

Associated Vulnerability

Vulnerability	OS Platform
Microsoft Exchange Server Hybrid Deployment Elevation of Privilege Vulnerability for Exchange Server 2019 CU14 HU4 (KB5050673) (CVE-2025-53786)	Windows
Microsoft Exchange Server Hybrid Deployment Elevation of Privilege Vulnerability for Exchange Server 2019 CU15 HU1 (KB5050672) (CVE-2025-53786)	Windows
Microsoft Exchange Server Hybrid Deployment Elevation of Privilege Vulnerability for Exchange Server 2016 CU23 HU15 (KB5050674)	Windows

Patch Details

Click to see the patches provided by ManageEngine for this CVE

Patch ID	Patch Description
PATCH-112353	Hotfix Update for Exchange Server 2019 CU14 HU4 (KB5050673)
PATCH-112352	Hotfix Update for Exchange Server 2019 CU15 HU1 (KB5050672)
PATCH-112354	Hotfix Update for Exchange Server 2016 CU23 HU15 (KB5050674)

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234