Vulnerability Report

CVE-2026-104286

CISA KEV Active

Title: Path Traversal in Fortinet FortiMail leads to arbitrary file write

Arbitrary File Access

Proof Of Concept

PoC Available for CVE-2026-104286

CWE Category CWE-22
Published Date Oct 01, 2026
Modified Date Oct 07, 2026
Exploit Status Available
Score 9.8 CVSS v3.1
Exploit Probability (EPSS)
4.57%

Vulnerability Summary

CVE-2026-104286: 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.

Impacted Vendors

F
fortinet 1

Reference Links

https://fortiguard.fortinet.com/psirt/FG-IR-26-175 https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-104286
CVSS v3.1
Source Entity [email protected]
Severity CRITICAL
9.8
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-104286 Exploits & PoCs (Proof Of Concept)

GitHub https://github.com/ShadowForge-Cyber/CVE-2026-104286-POC
View Code
GitHub https://github.com/techupdate24/fortimail-zero-day-cve-2026-104286
View Code
MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Stack

No specific products linked.