Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-104286

CVE-2026-104286CRITICAL

Fortinet FortiMail — An improper limitation of a pathname to a restricted directory ('path traversal') vulnerability in Fortinet FortiMail 8.0.0 through 8.0.1…

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  H  H  H    9.8   .0220   82.2   YES

AFFECTED
  Product    Versions  Fixed
  FortiMail  8.0.0 –   —

TIMELINE
  Oct 1   ADDED TO KEV — CVE-2026-104286 (Fortinet FortiMail). Remediation due October 4, 2026.
  Oct 1   Reserved by fortinet
  Oct 1   Published (CNA: fortinet)
  Oct 5   DUE DATE PASSED — CVE-2026-104286 (Fortinet FortiMail). CISA remediation deadline was October 4, 2026; still in catalog.

CWE-22 · CNA: fortinet · CVSS v3.1 · 2 references · NVD status: Analyzed · KEV due October 4, 2026

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.

Lifecycle

Complete event history — 4 events, chronological
Date	Event	Detail
October 1, 2026	KEV ADDED	ADDED TO KEV — CVE-2026-104286 (Fortinet FortiMail). Remediation due October 4, 2026.
October 1, 2026	Reserved	Reserved by fortinet
October 1, 2026	Published	Published (CNA: fortinet)
October 5, 2026	DUE DATE PASSED	DUE DATE PASSED — CVE-2026-104286 (Fortinet FortiMail). CISA remediation deadline was October 4, 2026; still in catalog.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Fortinet	FortiMail	—	8.0.0	—

Weaknesses

CWE-22

References (2)

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]

Authoritative record: CVE-2026-104286 at cve.org

Vendors: fortinet

Weaknesses: CWE-22

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-104286 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.