CVE-2025-34491: GFI MailEssentials < 21.8 MultiNode Insecure Deserialization

Published Apr 28, 2025
·
Updated

GFI MailEssentials prior to version 21.8 is vulnerable to a .NET deserialization issue. A remote and authenticated attacker can execute arbitrary code by sending crafted serialized .NET when joining to a Multi-Server setup.

Affected Software

2 affected components
GFI MailEssentials<21.8
GFI MailEssentials<21.8

Event History

Apr 28, 2025
CVE Published
via MITRE·07:20 PM
Data Sourced
via MITRE·07:20 PM
DescriptionSeverityWeakness
Data Sourced
via NVD·08:15 PM
DescriptionSeverityWeaknessAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2025-34491?

CVE-2025-34491 is classified as a critical vulnerability due to its potential for remote code execution.

2

How do I fix CVE-2025-34491?

To fix CVE-2025-34491, upgrade GFI MailEssentials to version 21.8 or later.

3

Who is affected by CVE-2025-34491?

CVE-2025-34491 affects users of GFI MailEssentials prior to version 21.8.

4

What types of attacks can exploit CVE-2025-34491?

CVE-2025-34491 can be exploited by an authenticated remote attacker using crafted serialized .NET data.

5

What vulnerability category does CVE-2025-34491 fall under?

CVE-2025-34491 falls under the category of .NET deserialization vulnerabilities.

Contact

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