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CVE-2025-53786

Microsoft Exchange Server Hybrid Deployment Elevation of Privilege Vulnerability

Published: Aug 6, 2025Updated: Jun 15, 2026 Sources: CVE List NVD BDUCWE-287
8.0HIGH
NVD MITRE
EPSS Score
7.4%
Top 6.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:HPR:HUI:NS:CC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:HPrivileges Required
High
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-287

Affected Products

Microsoft Corp
commercial·USaka microsoft, microsoft corporation
exchange serverOn-prem
Operating Systems / windows
exchange server subscription editionOn-premWeb App
Enterprise Software / itsm-monitoring
Microsoft Exchange Server 2016 Cumulative Update 23On-prem
Operating Systems
Microsoft Exchange Server 2019 Cumulative Update 14On-prem
Operating Systems / windows
Microsoft Exchange Server 2019 Cumulative Update 15On-premWeb App
Enterprise Software / itsm-monitoring
Microsoft Exchange Server Subscription Edition RTMOn-premWeb App
Enterprise Software / itsm-monitoring
Microsoft Exchange ServerOn-prem
Operating Systems

Exploitability

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Initial Access
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References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53786
msrc.microsoft.com
https://www.cisa.gov/news-events/directives/ed-25-02-mitigate-microsoft-exchange-vulnerability
cisa.gov
News mentions
Could not load news mentions.

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