CVE-2025-34491

PoC —

CVSS 3.1

8.8 high

EPSS

<1%p57

Published

Apr 28, 2025 (Apr 28, 2025)

Modified

Jun 17, 2026

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.

Vendors: gfi
Products: mailessentials
Weakness: CWE-502
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD CVE.org GitHub PoCs EPSS (0.9%)

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