CTI · reviewed · 2026-10-02

Fortinet warns of critical FortiMail flaw exploited in zero-day attacks

Full story & timeline

MITRE ATT&CK

• T1190 Exploit Public-Facing Application Initial Access

Indicators

Observables tied to this case, from the curated feed. raw sidecar

• cybersecurefox.com domain · active · corroborated

Detections

No detection content yet — case analysis did not yield signal-specific telemetry. Check back after the next daily CTI pass.

References

• https://www.bleepingcomputer.com/news/security/fortinet-warns-of-critical-fortimail-flaw-exploited-in-zero-day-attacks/
• https://www.securityweek.com/exploited-fortinet-fortimail-zero-day-calls-for-urgent-action/
• https://www.truesec.com/hub/blog/cve-2026-104286-fortimail-path-traversal-vulnerability-actively-exploited
• https://malware.news/t/cve-2026-104286-fortimail-path-traversal-vulnerability-actively-exploited/126090#post_1