Possible FortiWeb Authentication Bypass via Path Traversal to fwbcgi (via webserver)
- Category
- webserver
- Author
- HuntRule
- Published
- 2026-06-22
- Updated
- 2026-08-28
ATT&CK techniques
Initial Access → Defense EvasionRecon
Resource Dev
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact
What it detects
This rule detects HTTP requests to the FortiWeb management CMDB admin API that traverse into the internal fwbcgi CGI handler. This request pattern corresponds to CVE-2025-64446 which lets unauthenticated attackers create administrator accounts. Legitimate API clients do not reach cgi-bin through path traversal.
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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