CVE-2025-53782: Microsoft Exchange Server Elevation of Privilege Vulnerability

Published Oct 14, 2025
·
Updated

Incorrect implementation of authentication algorithm in Microsoft Exchange Server allows an unauthorized attacker to elevate privileges locally.

Other sources

Microsoft Exchange Server Elevation of Privilege Vulnerability

— Microsoft

Affected Software

43 affected componentsFixes available
Microsoft Exchange Server
Microsoft Exchange Server 2016=23
Patch available
Microsoft Exchange Server 2019=15
Patch available
Microsoft Exchange Server Subscription Edition RTM
Patch available
Microsoft Exchange Server 2019=14
Patch available
Microsoft Exchange Server=2016
Microsoft Exchange Server=2016-cumulative_update_1
Microsoft Exchange Server=2016-cumulative_update_10
Microsoft Exchange Server=2016-cumulative_update_11
Microsoft Exchange Server=2016-cumulative_update_12
Microsoft Exchange Server=2016-cumulative_update_13
Microsoft Exchange Server=2016-cumulative_update_14
Microsoft Exchange Server=2016-cumulative_update_15
Microsoft Exchange Server=2016-cumulative_update_16
Microsoft Exchange Server=2016-cumulative_update_17
Microsoft Exchange Server=2016-cumulative_update_18
Microsoft Exchange Server=2016-cumulative_update_19
Microsoft Exchange Server=2016-cumulative_update_2
Microsoft Exchange Server=2016-cumulative_update_20
Microsoft Exchange Server=2016-cumulative_update_21
Microsoft Exchange Server=2016-cumulative_update_22
Microsoft Exchange Server=2016-cumulative_update_3
Microsoft Exchange Server=2016-cumulative_update_4
Microsoft Exchange Server=2016-cumulative_update_5
Microsoft Exchange Server=2016-cumulative_update_6
Microsoft Exchange Server=2016-cumulative_update_7
Microsoft Exchange Server=2016-cumulative_update_8
Microsoft Exchange Server=2016-cumulative_update_9
Microsoft Exchange Server=2019
Microsoft Exchange Server=2019-cumulative_update_1
Microsoft Exchange Server=2019-cumulative_update_10
Microsoft Exchange Server=2019-cumulative_update_11
Microsoft Exchange Server=2019-cumulative_update_12
Microsoft Exchange Server=2019-cumulative_update_13
Microsoft Exchange Server=2019-cumulative_update_2
Microsoft Exchange Server=2019-cumulative_update_3
Microsoft Exchange Server=2019-cumulative_update_4
Microsoft Exchange Server=2019-cumulative_update_5
Microsoft Exchange Server=2019-cumulative_update_6
Microsoft Exchange Server=2019-cumulative_update_7
Microsoft Exchange Server=2019-cumulative_update_8
Microsoft Exchange Server=2019-cumulative_update_9
Microsoft Exchange Server Subscription Edition<15.02.2562.029

Event History

Oct 14, 2025
CVE Published
via Microsoft·07:00 AM
Data Sourced
via Microsoft·07:00 AM
DescriptionSeverityWeakness
Data Sourced
via Microsoft·02:00 PM
Affected Software
Updated
via Microsoft·02:00 PM
Affected Software
Updated
via Microsoft·02:00 PM
Description
CVE Published
via MITRE·05:00 PM
Data Sourced
via MITRE·05:00 PM
DescriptionSeverity
Data Sourced
via NVD·05:15 PM
DescriptionSeverityWeaknessAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2025-53782?

CVE-2025-53782 has a critical severity rating as it allows unauthorized attackers to elevate privileges in Microsoft Exchange Server.

2

How do I fix CVE-2025-53782?

To mitigate CVE-2025-53782, ensure you install the latest security updates and patches provided by Microsoft for Exchange Server.

3

What versions of Microsoft Exchange Server are affected by CVE-2025-53782?

CVE-2025-53782 affects various versions of Microsoft Exchange Server, and all users should update to the latest version.

4

Can CVE-2025-53782 be exploited remotely?

No, CVE-2025-53782 requires local access for exploitation, making it a local privilege escalation vulnerability.

5

What are the potential impacts of CVE-2025-53782?

Successful exploitation of CVE-2025-53782 can enable attackers to execute arbitrary commands with elevated privileges on affected systems.

Company

Resources

Contact

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CVE-2025-53782 - Microsoft Exchange Server Elevation of Privilege Vulnerability - SecAlerts