SB2026111145 - Uncontrolled Memory Allocation in FortiMail
Published: November 11, 2026
Security Bulletin ID
SB2026111145
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Uncontrolled Memory Allocation (CVE-ID: CVE-2026-126165)
CWE-ID: CWE-789 - Uncontrolled Memory Allocation
CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to uncontrolled memory allocation. A remote unauthenticated attacker can cause a denial of service via a specially crafted attachment delivered over SMTP.
Remediation
Install update from vendor's website.