CVE-2026-104286
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.
Key facts
- CVSS score
- 9.8 (v3.1)
- Severity
- CRITICAL
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- Weakness (CWE)
- CWE-22
- EPSS score
- 2.2% (82th percentile)
- In CISA KEV
- Yes, added October 1, 2026
- In EU EUVD
- Yes (EUVD-2026-91042)
- Published
- October 1, 2026
- NVD last modified
- October 7, 2026
- Status
- Analyzed
CISA Known Exploited Vulnerability
Fortinet FortiMail Path Traversal Vulnerability
Added to the KEV catalog on October 1, 2026; federal remediation due October 4, 2026.
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2026-91042 in the EU Vulnerability Database. ENISA flags it as known exploited. Last updated in EUVD on October 7, 2026.
View on the EU Vulnerability DatabaseAffected products
- fortinet / fortimail
Certified products that may be affected
1 FIPS 140 or Common Criteria certified product, from automated matching by sec-certs.org.
- FortiMail 7.4 - Fortinet, Inc. - Common Criteria CCEVS-VR-VID-11462-2024 - archived
References
- https://fortiguard.fortinet.com/psirt/FG-IR-26-175(Mitigation, Vendor Advisory)
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-104286(US Government Resource)
Last updated October 9, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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