CVE-2025-34491
High
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.
SeverityHigh
CVSS8.8
Exploit probability—
ProductGfi Mailessentials
PublishedApr 28, 2025
First seenApr 28, 2025
Weakness typeCWE-502Deserialization of untrusted data
How to fix
Update
- gfi mailessentials21.8 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| gfi mailessentials | v < 21.8 | 21.8 |
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