Possible FortiWeb Authentication Bypass via Path Traversal to fwbcgi (via webserver)

ATT&CK techniques

Initial Access → Defense Evasion

Recon
Resource Dev
Initial Access
- T1078.002Domain Accounts
- T1190Exploit Public-Facing Application
Execution
Persistence
- T1078.002Domain Accounts
Priv Esc
- T1078.002Domain Accounts
Defense Evasion
- T1078.002Domain Accounts
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

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Possible FortiWeb Authentication Bypass via Path Traversal to fwbcgi (via webserver)

Pivot detection · T1190 · 9 related

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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