Vulnerability · Published Apr 28, 2025 · Assigned by VulnCheck
CVE-2025-34489GFI MailEssentials < 21.8 Local Privilege Escalation
High 7.8
In plain English
A high-severity unsafe deserialization in MailEssentials from GFI. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 26% of all known vulnerabilities).
Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.3%top 74.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official 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 (as reported)
| Vendor | Product | Versions |
|---|---|---|
| GFI | MailEssentials | 0 – before 21.8 |
Weakness: CWE-502 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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