Description
GFI MailEssentials prior to version 21.8 is vulnerable to a local privilege escalation issue. A local attacker can escalate to NT Authority/SYSTEM by sending a crafted serialized payload to a .NET Remoting Service.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| GFI | MailEssentials | < 21.8 | 21.8 |
References
- https://frycos.github.io/vulns4free/2025/04/28/mailessentials.html technical-description exploit
- https://gfi.ai/products-and-solutions/network-security-solutions/mailessentials/resources/documentation/product-releases vendor-advisory
- https://www.vulncheck.com/advisories/gfi-mailessentials-local-privilege-escalation third-party-advisory