CVE-2025-34491 is a critical .NET deserialization vulnerability affecting GFI MailEssentials versions prior to 21.8. An authenticated, remote attacker can achieve arbitrary code execution by sending specially crafted serialized .NET data during a multi-server setup join operation. With a CVSS score of 8.8 (High), this vulnerability poses a significant risk due to its network attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. Currently, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or community discussion regarding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 21.8CPE matchmatch criteria | cpe:2.3:a:gfi:mailessentials:*:*:*:*:*:*:*:* | ||
>= 0, < 21.8CPE match | cpe:2.3:a:gfi:mailessentials:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.