CVE-2026-104286
Fortinet FortiMail Path Traversal Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.
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.
CISA 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
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.
Severity
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:CExploitation Context
as of October 14, 2026- CISA added CVE-2026-104286 to the KEV catalog on the day its CVE record was published. The median for entries added in 2026 so far is 15 days.
- It is one of 31 Fortinet entries in the CISA KEV catalog, and one of 8 added in 2026.
- Its current EPSS score (2.2%) is higher than that of 9% of CISA KEV entries.
Affected Products
| Vendor | Product | Affected versions |
|---|---|---|
| Fortinet | Fortinet FortiMail | 8.0.0 7.6.0 to 7.6.5 7.4.0 to 7.4.6 7.2.0 to 7.2.9 7.0.0 to 7.0.9 |
References
1 LinksRecord Details
More from Fortinet
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Fortinet FortiOS Heap-Based Buffer Overflow Vulnerability
Related
Tool categories
CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.