7.5
HIGH CVSS 3.1
CVE-2026-126165
Fortinet FortiMail Memory Allocation Denial of Service Vulnerability
Description

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.

INFO

Published Date :

Nov. 11, 2026, 9:29 p.m.

Last Modified :

Nov. 11, 2026, 9:29 p.m.

Remotely Exploit :

Yes !

Source :

fortinet
Affected Products

The following products are affected by CVE-2026-126165 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Fortinet fortimail
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 HIGH 6abe59d8-c742-4dff-8ce8-9b0ca1073da8
Solution
Apply security patches to affected FortiMail versions to fix memory allocation issues.
  • Update Fortinet FortiMail to a patched version.
  • Verify the update was applied successfully.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-126165 vulnerability anywhere in the article.

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.