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Forescout Research- Vedere Labs identified a series of intrusion based on two Fortinet vulnerabilities which began with the exploitation of FortiGate firewall appliance dubbed SuperBlack. Researchers track this between late january and early March.
Fortinet disclosed two authentication bypass vulnerabilities: CVE-2024-55591 in January and CVE-2025-24472 in February.
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When Fortinet first disclosed CVE-2024-55591 on January 14, they confirmed it had been exploited as a zero-day, with Arctic Wolf stating it had been used in attacks since November 2024 to breach FortiGate firewalls.
Confusingly, on February 11, Fortinet added CVE-2025-2447 to their January advisory, which led many to believe it was a newly exploited flaw. However, Fortinet told BleepingComputer that this bug was also fixed in January 2024 and was not exploited.
“We are not aware of CVE-2025-24472 ever being exploited,” Fortinet told BleepingComputer at the time.
However, a new report by Forescout researchers, says they discovered the SuperBlack attacks in late January 2025, with the threat actor utilizing CVE-2025-24472 as early as February 2, 2025.
“While Forescout itself did not directly report the 24472 exploitation to Fortinet, as one of the affected organizations we worked with was sharing findings from our investigation with Fortinet’s PSIRT team,” Forescout told BleepingComputer.
“Shortly afterward, Fortinet updated their advisory on February 11 to acknowledge CVE-2025-24472 as actively exploited.”
