A joint advisory from the UK NCSC and 18 international agencies warns that Russian FSB Centre 16 cyber actors are globally exploiting poorly configured routers and network devices to target critical national infrastructure. The group uses SNMP scanning to find devices with default or weak credentials and exploits known vulnerabilities in Cisco devices and web portals to gain control. The advisory coincides with UK sanctions and formal attribution of a December 2025 attack on Poland's energy grid to the same actor.
FSB Centre 16
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UK and Allies urge critical sectors to improve defences against Russian intelligence targeting