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Home - Vulnerability NotesPrint
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CERT-In Vulnerability Note CIVN-2025-0168
Elevation of Privilege Vulnerability in Microsoft Exchange Server Hybrid Deployment

Original Issue Date:August 11, 2025

Severity Rating: HIGH

Software Affected

  • Microsoft Exchange Server 2019 Cumulative Update 14
  • Microsoft Exchange Server 2016 Cumulative Update 23
  • Microsoft Exchange Server 2019 Cumulative Update 15
  • Microsoft Exchange Server Subscription Edition RTM

Overview

A vulnerability has been reported in Microsoft Exchange Server Hybrid Deployment which could allow an attacker to gain elevated privileges on the targeted system.

Target Audience:
All end-user organizations and individuals using the Microsoft Exchange Server Hybrid Deployment

Risk Assessment:
High risk of system compromise.

Impact Assessment:
Potential gaining unauthorized access to sensitive resources.

Description

This vulnerability exists in Microsoft Exchange Server Hybrid Deployment due to improper authentication. An attacker could exploit this vulnerability by sending a specially-crafted request to gain elevated privileges on the targeted system.

Successful exploitation of this vulnerability could allow an attacker to gain elevated privileges on the targeted system.

Solution

Apply appropriate upgrade as mention:
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53786

Vendor Information

Microsoft
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53786

References

Microsoft
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53786

CVE Name
CVE-2025-53786

Disclaimer

The information provided herein is on "as is" basis, without warranty of any kind.

Contact Information

Email: info@cert-in.org.in
Phone: +91-11-22902657

Postal address

Indian Computer Emergency Response Team (CERT-In)
Ministry of Electronics and Information Technology
Government of India
Electronics Niketan
6, CGO Complex, Lodhi Road,
New Delhi - 110 003
India

 
Indian Computer Emergency Response Team - CERT-In, Ministry of Electronics and Information Technology, Government of India.
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