CVE-2025-34491: GFI MailEssentials MultiNode Insecure Deserialization
First published: Mon 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.
Credit: disclosure@vulncheck.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| GFI MailEssentials | <21.8 |
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Reference Links
Frequently Asked Questions
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.
How do I fix CVE-2025-34491?
To fix CVE-2025-34491, upgrade GFI MailEssentials to version 21.8 or later.
Who is affected by CVE-2025-34491?
CVE-2025-34491 affects users of GFI MailEssentials prior to version 21.8.
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.
What vulnerability category does CVE-2025-34491 fall under?
CVE-2025-34491 falls under the category of .NET deserialization vulnerabilities.
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