Possible FortiWeb Authentication Bypass via Path Traversal to fwbcgi (via webserver)
- Category
- webserver
- Author
- HuntRule
- Published
- 2026-07-13
- Updated
- 2026-08-28
ATT&CK techniques
Initial Access → PersistenceRecon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact
What it detects
This rule detects in the wild exploitation of Fortinet FortiWeb CVE-2025-64446 where a request to the cmdb API traverses the path to the internal fwbcgi handler to bypass authentication and create administrative users. The combination of the cgi-bin fwbcgi target and directory traversal is a reliable exploitation marker.
Reporting behind it
Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.
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