CVE-2026-104286Fortinet FortiMail Path Traversal Vulnerability
An improper limitation of a pathname to a restricted directory ('path traversal') 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 7.2.0 through 7.2.9, FortiMail 7.0 all versions may allow an unauthenticated attacker to write arbitrary files on the underlying system via crafted HTTP or HTTPS requests.
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 9.8 | CRITICAL | 3.1fortinet (CNA) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| 9.8 | CRITICAL | 3.1fortinet (CNA) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C |
CISA required action
⚡ Known exploited · remediation due Oct 4, 2026
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Details
- CVE ID
- CVE-2026-104286
- Status
- Analyzed
- Assigner (CNA)
- fortinet
- Published
- Oct 1, 2026
- Last modified
- 2026-10-28 20:09 UTC
Affected Products
As published by the CNA in the CVE record.
FortinetFortiMail5 version ranges
- 8.0.0 through 8.0.1
- 7.6.0 through 7.6.6
- 7.4.0 through 7.4.8
- 7.2.0 through 7.2.9
- 7.0.0 through 7.0.9