CVE-2025-53786

Microsoft Exchange Server Hybrid Deployment Elevation of Privilege Vulnerability

Published Aug 6, 2025 CVSS 3.1 · 8 High EPSS 8.0% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-23857 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.
History
Type Values Removed Values Added
First Time appeared Microsoft exchange Server Subscription Edition
CPEs cpe:2.3:a:microsoft:exchange_server:-:*:*:*:subscription:*:*:* cpe:2.3:a:microsoft:exchange_server_subscription_edition:*:*:*:*:*:*:*:*
Vendors & Products Microsoft exchange Server Subscription Edition
Type Values Removed Values Added
CPEs cpe:2.3:a:microsoft:exchange_server:-:*:*:*:subscription:*:*:*
cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_23:*:*:*:*:*:*
cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_14:*:*:*:*:*:*
cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_15:*:*:*:*:*:*
Type Values Removed Values Added
First Time appeared Microsoft exchange Server 2016
Microsoft exchange Server 2019
Microsoft exchange Server Se
CPEs cpe:2.3:a:microsoft:exchange_server_2016:*:cumulative_update_23:*:*:*:*:*:*
cpe:2.3:a:microsoft:exchange_server_2019:*:cumulative_update_14:*:*:*:*:*:*
cpe:2.3:a:microsoft:exchange_server_2019:*:cumulative_update_15:*:*:*:*:*:*
cpe:2.3:a:microsoft:exchange_server_se:*:RTM:*:*:*:*:*:*
Vendors & Products Microsoft exchange Server 2016
Microsoft exchange Server 2019
Microsoft exchange Server Se
Type Values Removed Values Added
First Time appeared Microsoft
Microsoft exchange
Microsoft exchange Server
Vendors & Products Microsoft
Microsoft exchange
Microsoft exchange Server
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Microsoft Exchange Server Hybrid Deployment Elevation of Privilege Vulnerability
Weaknesses CWE-287
References
Metrics cvssV3_1

{'score': 8, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
microsoft
Published
Updated
Feb 26, 2026, 5:49 PM
Reserved
Jul 9, 2025, 1:40 PM
Status
Analyzed
Published
Aug 6, 2025, 4:15 PM
Modified
Jun 17, 2026, 9:38 AM