CVE-2025-34491 Information

Description

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.

Reference

https://frycos.github.io/vulns4free/2025/04/28/mailessentials.html https://gfi.ai/products-and-solutions/network-security-solutions/mailessentials/resources/documentation/product-releases

CNNVD-202510-911 (Published: 2025-10-07)

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