CVE-2026-104286
Summary
| CVE | CVE-2026-104286 |
|---|---|
| State | PUBLISHED |
| Assigner | fortinet |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-10-01 20:17:24 UTC |
| Updated | 2026-10-07 18:17:15 UTC |
| Description | 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 may allow an unauthenticated attacker to write arbitrary files on the underlying system via crafted HTTP or HTTPS requests. |
Risk And Classification
Primary CVSS: v3.1 9.8 CRITICAL from [email protected]
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.022010000 probability, percentile 0.823790000 (date 2026-10-22)
CISA KEV: Listed on 2026-10-01; due 2026-10-04; ransomware use Unknown
Problem Types: CWE-22 | CWE-22 Execute unauthorized code or commands
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 9.8 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | CNA | CVSS | 9.8 | CRITICAL | 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 |
CVSS v3.1 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA Known Exploited Vulnerability
| Vendor | Fortinet |
|---|---|
| Product | FortiMail |
| Name | Fortinet FortiMail Path Traversal Vulnerability |
| Required Action | 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. |
| Notes | https://fortiguard.fortinet.com/psirt/FG-IR-26-175 ; ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-104286 |
NVD Known Affected Configurations (CPE 2.3)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Fortinet | FortiMail | affected 8.0.0 | Not specified |
| CNA | Fortinet | FortiMail | affected 7.6.0 7.6.5 semver | Not specified |
| CNA | Fortinet | FortiMail | affected 7.4.0 7.4.6 semver | Not specified |
| CNA | Fortinet | FortiMail | affected 7.2.0 7.2.9 semver | Not specified |
| CNA | Fortinet | FortiMail | affected 7.0.0 7.0.9 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| fortiguard.fortinet.com/psirt/FG-IR-26-175 | [email protected] | fortiguard.fortinet.com | Mitigation, Vendor Advisory |
| www.cisa.gov/known-exploited-vulnerabilities-catalog | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | www.cisa.gov | US Government Resource |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
| CISA Known Exploited Vulnerabilities catalog | CISA | www.cisa.gov | kev |
Additional Advisory Data
Solutions
CNA: Upgrade to upcoming FortiMail version 8.0.1 or above Upgrade to upcoming FortiMail version 7.6.6 or above Upgrade to upcoming FortiMail version 7.4.8 or above Upgrade to upcoming FortiMail version 7.2.10 or above Upgrade to FortiRecorder version 7.6.1 or above Upgrade to FortiRecorder version 7.2.12 or above Upgrade to upcoming FortiRecorder version 7.0.7 or above Fortinet remediated this issue in FortiMail Cloud version 25.1 (not released) and hence customers do not need to perform any action.