CVE-2026-126165
Last modified
CVE-2026-126165 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 0.40% chance of exploitation in the next 30 days.
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.
Metrics
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Fortinet | FortiMail | >= 8.0.0, <= 8.0.1; >= 7.6.0, <= 7.6.6; >= 7.4.0, <= 7.4.8; >= 7.2.0, <= 7.2.9; >= 7.0.0, <= 7.0.9 |
References
Timeline
- Published
- Last Modified
- Status
- Awaiting Analysis
Frequently Asked Questions
What is CVE-2026-126165?
How severe is CVE-2026-126165?
How do I fix CVE-2026-126165?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-12616The /v1/upload/sbom endpoint extracts the iss claim from the…6.9
- CVE-2026-126160A improper authentication vulnerability in Fortinet FortiMai…8.2
- CVE-2026-126161A uncontrolled resource consumption vulnerability in Fortine…7.5
- CVE-2026-126162A xml injection (aka blind xpath injection) vulnerability in…8.7
- CVE-2026-126163A use of externally-controlled format string vulnerability i…8.1
- CVE-2026-126164A improper neutralization of special elements used in an sql…9.4
- CVE-2026-126166A improper neutralization of argument delimiters in a comman…7.2
- CVE-2026-126167A improper neutralization of special elements used in a comm…7.2
- CVE-2026-126168A improper neutralization of argument delimiters in a comman…7.2
- CVE-2026-126169A improper neutralization of argument delimiters in a comman…7.2
- CVE-2026-12617The issue is unexpected program termination based on orderin…7.5
- CVE-2026-126170A improper encoding or escaping of output vulnerability in F…9.8
Are you affected by CVE-2026-126165?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST