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CVE-2026-104286

Fortinet FortiMail Path Traversal Vulnerability

Fortinet · FortiMail · Added to KEV: 2026-10-01 · Snapshot: 2026-10-18T20:43:22.315380+00:00

CVSS base severity9.8CRITICAL · cvssMetricV31
EPSS probability2.20%Percentile: 82.22% · 2026-10-18
CISA KEVKnown exploitedKEV is a global exploitation signal, not an asset scan

Technical context

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.

Action and remediation

Review the vendor advisory, determine affected versions, apply the vendor-supported fix or mitigation, and validate the change.

Check vendor advisories and affected-version data before remediation. Validate affected software, identify internet reachability and business criticality in your authorised environment, and confirm mitigating controls. No AI-generated fix is asserted as vendor guidance.

Evidence links

Exposure and confidence limitations

Shodan identifies observable services but does not independently prove exploitation or confirm every affected software version. CyberIntel does not join this CVE to arbitrary public host IPs. No Tenable VPR or Qualys TruRisk score is calculated or implied.