All news with #reconnaissance tag

Surge in Network Scans Targets Cisco ASA Devices Worldwide

🔎 Security researchers observed a large surge in network scans probing Cisco ASA login portals and Cisco IOS Telnet/SSH endpoints, with GreyNoise recording two major spikes in late August 2025. The second wave on August 26, 2025, was largely (about 80%) driven by a Brazilian botnet using roughly 17,000 IPs and overlapping Chrome-like user agents that suggest a common origin. Administrators are urged to apply the latest patches, enforce MFA for remote ASA logins, avoid exposing management pages and services directly, and use VPN concentrators, reverse proxies, geo-blocking, and rate limiting to reduce risk.