High severity7.8NVD Advisory· Published Apr 28, 2025· Updated Jun 17, 2026

CVE-2025-34489

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Gfi/Mailessentials3 versions
cpe:2.3:a:gfi:mailessentials:*:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:a:gfi:mailessentials:*:*:*:*:*:*:*:*range: <21.8
- (no CPE)range: <21.8
- (no CPE)range: 0

Patches

Vulnerability mechanics

References

frycos.github.io/vulns4free/2025/04/28/mailessentials.htmlnvdExploit
gfi.ai/products-and-solutions/network-security-solutions/mailessentials/resources/documentation/product-releasesnvdRelease Notes
www.vulncheck.com/advisories/gfi-mailessentials-local-privilege-escalationnvd

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