PSIRT DoS due to unsafe function in signal handler Summary A use of potentially Dangerous Function vulnerability [CWE-676] in FortiAnalyzer and FortiManager API may allow an authenticated attacker to cause a system hang via multiple specially crafted HTTP requests causing crashes. This happens if internal locks are aligned, which is out of control of the attacker. Version Affected Solution FortiAnalyzer 8.0 Not affected Not Applicable FortiAnalyzer 7.6 7.6.0 through 7.6.4 Upgrade to 7.6.5 or above FortiAnalyzer 7.4 7.4.0 through 7.4.8 Upgrade to 7.4.9 or above FortiAnalyzer 7.2 7.2 all versions Migrate to a fixed release FortiManager 8.0 Not affected Not Applicable FortiManager 7.6 7.6.0 through 7.6.4 Upgrade to 7.6.5 or above FortiManager 7.4 7.4.0 through 7.4.8 Upgrade to 7.4.9 or above FortiManager 7.2 7.2 all versions Migrate to a fixed release Acknowledgement Internally discovered and reported by Loic Pantano of Fortinet PSIRT Timeline 2026-05-12: Initial publication IR Number FG-IR-26-137 Published Date May 12, 2026 Component API Severity Medium Discovered Internal Attack Type Authenticated Known Exploited No CVSSv3 Score 5.2 Impact Denial of service CVE ID CVE-2025-67604 Download CVRF CSAF