FBI: Attackers Continue to Exploit Unpatched Fortinet Flaws Twitter FBI urges users to apply Fortinet patches, Advanced persistent threat groups are continuing to exploit unpatched flaws in Fortinet products, the FBI says in a flash alert. For example, an APT group apparently recently exploited a Fortigate appliance to access a web server hosting the domain for a U.S. municipal government. Earlier, the FBI issued a warning about three vulnerabilities in Fortinet's operating system, FortiOS (see: The bureau urges users of vulnerable Fortinet products to immediately patch the flaws to prevent attacks. Vulnerabilities According to the FBI, the three FortiOS vulnerabilities that are still being exploited are: