Attackers are exploiting FortiSandbox vulnerabilities

Attackers have been spotted exploiting three vulnerabilities (CVE-2026-39813, CVE-2026-39808, CVE-2026-25089) in FortiSandbox, a platform that other Fortinet security products depend on for threat verdicts to enforce blocking decisions and trigger automated responses. The warning came on Monday from threat intelligence company Defused, which said that the exploit for one of the flaws is vibecoded, and likely faulty. The vulnerabilities Fortinet disclosed CVE-2026-39813 and CVE-2026-39808 in April 2026. The former is a path traversal vulnerability in … More →

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