{"id":"CVE-2025-34491","aliases":["EUVD-2025-14683","GHSA-fqqj-qgxm-vg3x"],"status":"published","title":"GFI MailEssentials \u003c 21.8 MultiNode Insecure Deserialization","description":"GFI MailEssentials prior to version 21.8 is vulnerable to a .NET deserialization issue. A remote and authenticated attacker can execute arbitrary code by sending crafted serialized .NET when joining to a Multi-Server setup.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00963,"percentile":0.62091,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-502"],"published":"2025-04-28T19:20:02Z","modified":"2026-06-17T09:14:01Z","products":[{"vendor":"gfi","product":"mailessentials"}],"references":[{"url":"https://frycos.github.io/vulns4free/2025/04/28/mailessentials.html","tags":["technical-description","exploit","Exploit"]},{"url":"https://gfi.ai/products-and-solutions/network-security-solutions/mailessentials/resources/documentation/product-releases","tags":["vendor-advisory","Release Notes"]},{"url":"https://www.vulncheck.com/advisories/gfi-mailessentials-multinode-insecure-deserialization","tags":["third-party-advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-34491"},{"url":"https://github.com/advisories/GHSA-fqqj-qgxm-vg3x"}],"sources":{"cve":[{"id":"CVE-2025-34491","title":"GFI MailEssentials \u003c 21.8 MultiNode Insecure Deserialization","description":"GFI MailEssentials prior to version 21.8 is vulnerable to a .NET deserialization issue. A remote and authenticated attacker can execute arbitrary code by sending crafted serialized .NET when joining to a Multi-Server setup.","status":"published","published":"2025-04-28T19:20:02.027Z","modified":"2025-11-19T01:25:57.239Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-502"],"updated_at":"2026-11-02T14:32:54.1527Z"}],"euvd":[{"id":"EUVD-2025-14683","description":"GFI MailEssentials prior to version 21.8 is vulnerable to a .NET deserialization issue. A remote and authenticated attacker can execute arbitrary code by sending crafted serialized .NET when joining to a Multi-Server setup.","status":"published","published":"2025-04-28T19:20:02Z","modified":"2025-11-19T01:25:57Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T19:49:15.429944Z"}],"ghsa":[{"id":"GHSA-fqqj-qgxm-vg3x","title":"GFI MailEssentials prior to version 21.8 is vulnerable to a .NET deserialization issue. A remote...","description":"GFI MailEssentials prior to version 21.8 is vulnerable to a .NET deserialization issue. A remote and authenticated attacker can execute arbitrary code by sending crafted serialized .NET when joining to a Multi-Server setup.","status":"published","published":"2025-04-28T21:30:43Z","modified":"2025-11-05T00:31:19Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-502"],"updated_at":"2026-11-02T15:04:38.82847Z"}],"nvd":[{"id":"CVE-2025-34491","description":"GFI MailEssentials prior to version 21.8 is vulnerable to a .NET deserialization issue. A remote and authenticated attacker can execute arbitrary code by sending crafted serialized .NET when joining to a Multi-Server setup.","status":"published","published":"2025-04-28T20:15:20.997Z","modified":"2026-06-17T09:14:01.813Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-502"],"updated_at":"2026-11-02T14:11:02.570368Z"}]}}