CVE-2025-34489

GFI MailEssentials < 21.8 Local Privilege Escalation

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

GFI · MailEssentials

CVSS v3.1 NVD

7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

0.33% chance of exploitation in the next 30 days, 24th percentile

Published

2025-04-28

Updated

2025-11-19

Proof-of-concept exploits (1)

• https://frycos.github.io/vulns4free/2025/04/28/mailessentials.html

Security advisories

• https://gfi.ai/products-and-solutions/network-security-solutions/mailessentials/resources…

References

• CVE Record
• NVD entry