Path Traversal Vulnerability in Fortinet FortiMail Products
CVE-2026-104286

9.8CRITICAL

Key Information:

Vendor

Fortinet
Status
Fortimail
Vendor
CVE Published:
1 October 2026

What is CVE-2026-104286?

A path traversal vulnerability exists in Fortinet's FortiMail products, affecting multiple versions. This issue allows unauthenticated attackers to craft HTTP or HTTPS requests that can lead to unauthorized file writing on the underlying system. Implementing proper access controls and promptly applying updates is crucial to mitigate associated risks.

Affected Version(s)

FortiMail 8.0.0

FortiMail 7.6.0 <= 7.6.5

FortiMail 7.4.0 <= 7.4.6

References

https://fortiguard.fortinet.com/psirt/FG-IR-26-175

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.