VulnerabilityModified

CVE-2025-34489

GFI MailEssentials prior to version 21.8 is vulnerable to a local privilege escalation issue.

HIGH 7.8EPSS 0.31%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.31%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

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.

CVSS 3.1: 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.31% probability · 24th percentile
CISA KEV: Not listed
Weakness: CWE-502
Affected: gfi/mailessentials
Source: disclosure@vulncheck.com

References

https://frycos.github.io/vulns4free/2025/04/28/mailessentials.htmlExploit
https://gfi.ai/products-and-solutions/network-security-solutions/mailessentials/resources/documentation/product-releasesRelease Notes
https://www.vulncheck.com/advisories/gfi-mailessentials-local-privilege-escalation

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.