CVE-2025-34491HIGH 8.8EPSS p48.8%

CVE-2025-34491CVE-2025-34491

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.

Scoring

CVSS 3.18.8 (HIGH)
VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS0.71% probability of exploitation · percentile 48.8% · 2026-06-19T12:03:05Z
Published2025-04-28
Last modified2025-11-04

Underlying weaknesses· 1

CWE-502

References

  1. https://frycos.github.io/vulns4free/2025/04/28/mailessentials.html
  2. https://gfi.ai/products-and-solutions/network-security-solutions/mailessentials/resources/documentation/product-releases
  3. https://www.vulncheck.com/advisories/gfi-mailessentials-multinode-insecure-deserialization

1

TypeTargetConfidenceTier
WeaknessDeserialization of Untrusted Datacwe-5020%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.