CVE-2025-53786
BaseFortify
Publication date: 2025-08-06
Last updated on: 2026-02-27
Assigner: Microsoft Corporation
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| microsoft | exchange_server | 2016 |
| microsoft | exchange_server | 2019 |
| microsoft | exchange_server | * |
| microsoft | exchange_server | 2019 |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-287 | When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability relates to security implications in Microsoft Exchange Server hybrid deployments following the security changes announced on April 18th, 2025. It involves specific risks tied to the guidance and configuration steps from that announcement. Microsoft addressed this vulnerability through a Hot Fix and recommended configuration changes to improve the security of hybrid Exchange environments.
How can this vulnerability impact me? :
The vulnerability has a high severity with a CVSS base score of 8.0, indicating it can lead to significant impacts including high confidentiality, integrity, and availability losses in Exchange Server hybrid deployments if not addressed. It requires network attack with high privileges and can affect the security of your hybrid Exchange environment.
What immediate steps should I take to mitigate this vulnerability?
To mitigate this vulnerability, you should read the information provided in Microsoft's April 18th, 2025 announcement, install the April 2025 (or later) Hot Fix for Exchange Server, and implement the recommended security changes for hybrid Exchange deployments as documented in that announcement.