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CVE-2026-104286

9.8 critical KEV · due 2026-10-04 exploit ×5 SSVC exploitation: active Modified
NVD · CVE.org · CISA KEV

An improper limitation of a pathname to a restricted directory ('path traversal') vulnerability in Fortinet FortiMail 8.0.0, FortiMail 7.6.0 through 7.6.5, FortiMail 7.4.0 through 7.4.7, FortiMail 7.2.0 through 7.2.9, FortiMail 7.0 all versions may allow an unauthenticated attacker to write arbitrary files on the underlying system via crafted HTTP or HTTPS requests.

Fix

Public exploits 5

Each line links to the index that lists it, never to exploit code. Exploit-DB's "verified" and a Metasploit rank of good or better count as verified; a PoC-in-GitHub entry is a repository's claim.

CISA KEV required action · due 2026-10-04

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.

Added to the catalog 2026-10-01. CISA KEV

Patch, vendor advisory and mitigation references on NVD 1

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

In the news 1

Change history 6

  1. CISA KEVadded to CISA KEV, due 2026-10-04NVD modified 2026-10-28 14:16
  2. References+1 references (now 2)NVD modified 2026-10-28 14:16
  3. Cpes+1 -35 CPE criteria (now 1)NVD modified 2026-10-28 14:16
  4. StatusPublished → ModifiedNVD modified 2026-10-28 14:16
  5. CVSS9.8 (v3.1, 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) → 9.8 (v3.1, CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)NVD modified 2026-10-28 14:16
  6. First seenCVSS 9.8 · fortinetNVD modified 2026-10-28 13:17

Affected (CPE criteria) 1

  • cpe:2.3:a:fortinet:fortimail:*:*:*:*:*:*:*:*

References 2