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25,000 IPs Scanned Cisco ASA Devices — New Vulnerability Potentially Incoming

infogreynoise_blogPublished 2025-09-04

GreyNoise observed two scanning surges against Cisco Adaptive Security Appliance (ASA) devices in late August including more than 25,000 unique IPs in a single burst. This activity represents a significant elevation above baseline, typically registering at less than 500 IPs per day.

Original source: https://www.greynoise.io/blog/scanning-surge-cisco-asa-devices