CVE-2026-126165 · Infrastructure
NO FIX YET · SEE WHAT TO DO
A memory allocation flaw in Fortinet FortiMail lets a remote, unauthenticated sender crash the mail service with a specially crafted attachment delivered over SMTP. The result is a denial of service, not code execution, according to the description.
first public Nov 11, 2026 · 1 source
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Organizations running Fortinet FortiMail email security appliances in the affected version ranges, especially those with SMTP reachable from outside. Sites running other mail products or versions outside these ranges are not named in the sources.
Not affected if version-outside-affected-ranges
Who cares email-gateway, fortimail, fortinet, smtp
8.0.0 through 8.0.1, 7.6.0 through 7.6.6, 7.4.0 through 7.4.8, and all 7.2 versions are affected; the sources do not name the fixed version.A memory allocation with excessive size value vulnerability in Fortinet FortiMail 8.0.0 through 8.0.1, FortiMail 7.6.0 through 7.6.6, FortiMail 7.4.0 through 7.4.8, FortiMail 7.2 all versions may allow a remote unauthenticated attacker to cause a denial of service via a specially crafted attachment delivered over SMTP.
This page as .md · .json · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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