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Upgrade to ProDetect Fortinet FortiOS Sensitive Information Exposure (CVE-2025-68686) in Sumo Logic CSE
CVE-2025-68686 is an Exposure of Sensitive Information to an Unauthorized Actor vulnerability (CWE-200) in Fortinet FortiOS, added to CISA's Known Exploited Vulnerabilities catalog. Unauthorized actors may be able to access sensitive information exposed by affected FortiOS instances, potentially including configuration data, credentials, session tokens, or internal system details that could facilitate further compromise. This detection focuses on identifying anomalous access to FortiOS management interfaces, unusual API/CLI enumeration behavior, and downstream indicators of information disclosure abuse such as suspicious authentication following reconnaissance against exposed FortiOS endpoints.
MITRE ATT&CK
Sumo Detection Query
_sourceCategory=fortios/firewall
| parse "* * *" as src_ip, dest_ip, action
| where action matches "*admin*" or action matches "*config*" or action matches "*backup*"
| timeslice 1h
| count as request_count by src_ip, dest_ip, _timeslice
| where request_count > 20
| sort by request_count descSurfaces high-frequency administrative/configuration access events on FortiOS devices consistent with attempted exploitation of CVE-2025-68686.
Data Sources
Required Tables
False Positives & Tuning
- Routine config export automation
- High-volume legitimate admin activity during change windows
- Third-party monitoring integrations polling device state
Other platforms for CVE-2025-68686
Testing Methodology
Validate this detection against 3 adversary techniques from Atomic Red Team. Each test below lists the behaviour to exercise and the telemetry you should expect to see. Executable commands and cleanup steps are available with Pro.
- Test 1Simulate high-volume FortiOS admin API access
Expected signal: Multiple HTTP GET requests to /api/v2/cmdb/* endpoint from a single source IP within a short time window, logged in firewall/proxy logs.
- Test 2Simulate FortiOS config backup enumeration
Expected signal: Repeated backup/config-related HTTP requests logged in FortiOS event logs and network proxy logs.
- Test 3Simulate SSL-VPN portal session enumeration
Expected signal: Multiple failed/attempted SSL-VPN login events logged with consistent source IP within a short window.
References (4)
- https://fortiguard.fortinet.com/psirt/FG-IR-25-934
- https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk
- https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk
- https://nvd.nist.gov/vuln/detail/CVE-2025-68686
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