high8.8
CVE-2025-34491
GFI MailEssentials prior to version 21.8 is vulnerable to a .NET deserialization issue.
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Gfi | Mailessentials | before 21.8 |
Weakness classification
References
- NVD record
- CVE.org record
- https://frycos.github.io/vulns4free/2025/04/28/mailessentials.html
- https://gfi.ai/products-and-solutions/network-security-solutions/mailessentials/resources/documentation/product-releases
- https://www.vulncheck.com/advisories/gfi-mailessentials-multinode-insecure-deserialization