Spike in Fortinet VPN brute-force attacks raises zero-day concerns
A massive spike in brute-force attacks targeted Fortinet SSL VPNs earlier this month, followed by a switch to FortiManager, marked a deliberate shift in targeting that has historically preceded new vulnerability disclosures. The campaign, detected by threat monitoring platform GreyNoise, manifested in two waves, on August 3 and August 5, with the second wave pivoting to FortiManager targeting with a different TCP signature. As GreyNoise previously reported, such spikes in deliberate scanning a