Elevation of Privilege Vulnerability in Microsoft Exchange Server
CVE-2025-53786

8HIGH

Key Information:

Vendor

Microsoft
Status
Microsoft Exchange Server Subscription Edition Rtm
Microsoft Exchange Server 2019 Cumulative Update 15
Microsoft Exchange Server 2016 Cumulative Update 23
Microsoft Exchange Server 2019 Cumulative Update 14
Vendor
CVE Published:
6 August 2025

Badges

🥇 Trended No. 1📈 Trended📈 Score: 10,100💰 Ransomware👾 Exploit Exists📰 News Worthy

What is CVE-2025-53786?

CVE-2025-53786 is an elevation of privilege vulnerability identified in Microsoft Exchange Server, a widely used email and calendaring server known for its integral role in organizational communication and coordination. This vulnerability arises from security implications associated with Microsoft's configurations made for hybrid deployments, which integrate both on-premises Exchange servers and cloud services. When exploited, this vulnerability could allow attackers to gain elevated privileges, enabling them to execute unauthorized actions within the affected systems. Such an attack could undermine the integrity of sensitive data, disrupt communications, and compromise the overall security posture of an organization.

Potential impact of CVE-2025-53786

  1. Unauthorized Access and Control: Attackers exploiting this vulnerability could gain elevated privileges, allowing them to access restricted data and system functionalities that they would not typically have permission to use, leading to potential data breaches.

  2. Compromise of Hybrid Environments: As many organizations operate in hybrid environments, an exploit could jeopardize secure communication between on-premises and cloud resources, putting critical organizational infrastructure at risk.

  3. Data Integrity Risks: With the ability to execute unauthorized actions, attackers could manipulate or delete crucial data, resulting in loss of data integrity and trust in organizational processes, ultimately impacting operational continuity and compliance with data protection regulations.

Affected Version(s)

Microsoft Exchange Server 2016 Cumulative Update 23 x64-based Systems 15.01.0 < 15.01.2507.055

Microsoft Exchange Server 2019 Cumulative Update 14 x64-based Systems 15.02.0.0 < 15.02.1544.025

Microsoft Exchange Server 2019 Cumulative Update 15 x64-based Systems 15.02.0 < 15.02.1748.024

News Articles

favicon imageBleepingComputer

Canada’s House of Commons investigating data breach after cyberattack

The House of Commons of Canada is currently investigating a data breach after a threat actor reportedly stole employee information in a cyberattack on Friday.

2 weeks ago

favicon imageBleepingComputer

Over 29,000 Exchange servers unpatched against high-severity flaw

Over 29,000 Exchange servers exposed online remain unpatched against a high-severity vulnerability that can let attackers move laterally in Microsoft cloud environments, potentially leading to complete domain compromise.

2 weeks ago

favicon imageGBHackers News

Over 28,000 Microsoft Exchange Servers Exposed Online to CVE-2025-53786 Vulnerability

The cybersecurity community faces a significant threat as scanning data reveals over 28,000 unpatched Microsoft Exchange servers remain exposed.

3 weeks ago

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisory

CVSS V3.1

Score:
8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
High
User Interaction:
None
Scope:
Changed

Timeline

  • 💰

    Used in Ransomware

  • 🥇

    Vulnerability reached the number 1 worldwide trending spot

  • 📈

    Vulnerability started trending

  • 👾

    Exploit known to exist

  • 📰

    First article discovered by GBHackers News

  • Vulnerability published

  • Vulnerability Reserved

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CVE-2025-53786 : Elevation of Privilege Vulnerability in Microsoft Exchange Server