KEV Entry

CVE-2026-104286

Known Exploited Vulnerability Entry CISA

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Entry Details
Confirmed Exploited

CVE-2026-104286

2026-10-01 00:00 UTC

Timestamps

2026-10-01

2026-10-01

Scope

Fortinet FortiMail Path Traversal Vulnerability | Affected: Fortinet / FortiMail | Description: Fortinet FortiMail contains a path traversal and an improper neutralization of NULL byte or NULL character vulnerability that may allow an unauthenticated attacker to write arbitrary files on the underlying system via crafted HTTP or HTTPS requests. | Required action: 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. | Due date: 2026-10-04 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://fortiguard.fortinet.com/psirt/FG-IR-26-175 ; ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-104286

References
  • {'id': 'CVE-2026-104286', 'url': 'https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2026-104286'}

3eba963f-be1d-4d4b-94f8-35121a25a10c

CISA
405284c2-e461-4670-8979-7fd2c9755a60

2026-10-01 20:00 UTC

2026-10-01 20:00 UTC

Evidence
1
Type Source Signal Confidence Details GCVE Metadata
vendor_report cisa-kev successful_exploitation 0.80
View details 
{
  "cwes": [
    "CWE-22",
    "CWE-158"
  ],
  "date_added": "2026-10-01",
  "due_date": "2026-10-04",
  "feed": "CISA Known Exploited Vulnerabilities Catalog",
  "knownRansomwareCampaignUse": "Unknown",
  "product": "FortiMail",
  "vendorProject": "Fortinet",
  "vulnerabilityName": "Fortinet FortiMail Path Traversal Vulnerability"
}
 -
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