CVE-2025-34491

HighCVSS 8.8/10Last 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.

Metrics

CVSS 3.1 8.8/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-502

Affected software

No affected versions have been published.

Timeline

Published: Apr 28, 2025
Last modified: Jun 17, 2026
NVD status: Modified

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