CVE-2025-34489 HIGH

CVE-2025-34489: GFI MailEssentials < 21.8 Local Privilege Escalation

Vendor Gfi
Product MailEssentials
Weakness CWE-502 · Unsafe deserialization
Published April 28, 2025
Last update November 19, 2025
View on NVD All CVEs

CVSS base score

7.8/10
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality High
Integrity High

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

April 28, 2025 CVE published
November 19, 2025 Record updated