Are you blind to the next big firewall exploit? Warning signs and lessons learned from the recent Cisco exploit
It feels like the security world is caught in a recurring cycle. We see a spike in strange scanning activity, file it away as internet background noise, and then weeks later, a major zero-day exploit drops, targeting the very technology that was being scanned. The recent Cisco ASA vulnerabilities were a textbook example of this pattern. A September 4, 2025, report from GreyNoise highlighted a massive surge in scanning, with over 25,000 unique IPs probing Cisco ASA devices.