CVE-2026-104286

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score elevated to 9.8 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2026-10-01), indicating real-world exploitation has been confirmed by US federal agencies. The CNA's CVSS baseline 9.8 retained for reference (NVD's own analysis pending). Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, cna:fortinet, epss, ghsa
Trending — KEV-added this weekExploited in the wild
9.8EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 2.2%CVSS: 9.8Exploit: cisa kev · ssvc activeExposed services: Not assessed

A fix is available — apply it.

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.

CVSS v3
9.8
EG Score
9.8CRITICALhigh confidence
EG Risk
99
EG Risk 99/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation100% × 40%
Automatability100% × 15%
CISA SSVC: Attend at low mission impact; Act at medium or high.
Action: A fix is available. Apply it sooner than your standard update timelines at low mission impact and as soon as possible at medium or high.
EPSS PROB
2.2%
EPSS %ILE
81st
KEV
⚠ Exploited

CISA SSVCAttend at low mission impact; Act at medium or high.

A fix is available. Apply it sooner than your standard update timelines at low mission impact and as soon as possible at medium or high.

Exploitation active (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

October 1, 2026

Last Modified

October 2, 2026

Advisory Details (2)

Auto-updated Oct 2, 2026
⚠️ Active exploitation confirmed. Patch available.
generic🔴 Active Exploitation

PSIRT | FortiGuard Labs

https://fortiguard.fortinet.com/psirt/FG-IR-26-175
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-104286

Vendor Advisories for CVE-2026-104286(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 32× in last 7d / 32× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-10-04 13:02 UTCGHSA enrichment
  2. 2026-10-04 08:37 UTCGHSA enrichment
  3. 2026-10-04 04:12 UTCGHSA enrichment
  4. 2026-10-03 23:48 UTCGHSA enrichment
  5. 2026-10-03 19:23 UTCGHSA enrichment
  6. 2026-10-03 14:59 UTCEG score recompute
  7. 2026-10-03 14:58 UTCGHSA enrichment
  8. 2026-10-03 14:25 UTCEPSS rescore
  9. 2026-10-03 10:33 UTCGHSA enrichment
  10. 2026-10-03 06:09 UTCGHSA enrichment
  11. 2026-10-03 01:45 UTCGHSA enrichment
  12. 2026-10-02 21:21 UTCGHSA enrichment
  13. 2026-10-02 16:55 UTCEG score recompute
  14. 2026-10-02 16:55 UTCGHSA enrichment
  15. 2026-10-02 15:56 UTCGHSA enrichment
  16. 2026-10-02 14:51 UTCEG score recompute
  17. 2026-10-02 14:51 UTCGHSA enrichment
  18. 2026-10-02 12:36 UTCEG score recompute
  19. 2026-10-02 12:36 UTCGHSA enrichment
  20. 2026-10-02 11:28 UTCEG score recompute
  21. 2026-10-02 11:28 UTCGHSA enrichment
  22. 2026-10-02 08:44 UTCGHSA enrichment
  23. 2026-10-02 04:20 UTCGHSA enrichment
  24. 2026-10-02 01:48 UTCEG score recompute
  25. 2026-10-02 01:47 UTCGHSA enrichment
Show 7 more
  1. 2026-10-01 21:20 UTCEG score recompute
  2. 2026-10-01 20:22 UTCEG score recompute
  3. 2026-10-01 20:01 UTCEG score recompute
  4. 2026-10-01 20:00 UTCCISA KEV update
  5. 2026-10-01 19:46 UTCEG score recompute
  6. 2026-10-01 19:31 UTCEG score recompute
  7. 2026-10-01 19:30 UTCMITRE cvelistV5first tracked

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Frequently asked(6)

What is CVE-2026-104286?
CVE-2026-104286 is a critical vulnerability published on October 1, 2026. 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…
When was CVE-2026-104286 disclosed?
CVE-2026-104286 was first published on October 1, 2026, with the most recent update on October 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-104286 actively exploited?
Yes. CISA added CVE-2026-104286 to the Known Exploited Vulnerabilities catalog on October 1, 2026, affecting Fortinet FortiMail. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate attention. A fix is available. Apply it.
What is the CVSS score of CVE-2026-104286?
CVE-2026-104286 has a CVSS base score of 9.8 (the CNA's own assessment, by fortinet; NVD's own analysis pending).
Which products are affected by CVE-2026-104286?
CVE-2026-104286 affects Fortinet FortiMail.
How do I remediate CVE-2026-104286?
A fix for CVE-2026-104286 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-104286 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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