CVE-2026-104286
Path Traversal in Fortinet FortiMail. CISA confirmed attackers exploit it and added it to its Known Exploited Vulnerabilities catalog on 1 October 2026.
- Product
- Fortinet FortiMail
- Added to CISA's catalog
- Federal fix-by date
- Ransomware
- No known use in ransomware campaigns
- Vendor advisories
- Sources
- CISA’s catalog, NVD entry
CISA’s 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.
More from Fortinet this year.
- CVE-2025-61624 Path Traversal, added
- CVE-2025-25249 Heap-based Buffer Overflow, added
- CVE-2025-68686 Exposure of Sensitive Information to an Unauthorized Actor, added
- CVE-2026-39808 OS Command Injection, added
- CVE-2026-25089 OS Command Injection, added
- CVE-2026-21643 SQL Injection, added
- CVE-2026-35616 Improper Access Control, added
- CVE-2026-24858 Authentication Bypass Using an Alternate Path or Channel, added
Every flaw CISA confirmed exploited in the last 30 days is on the exploit watch. This is not security advice. Check the vendor’s advisory before acting. From CISA’s catalog of 4 November 2026.