September 25, 2026
- Denmark raised its destructive-cyberattack threat level from medium to high, based on assessments from the Defence Intelligence Service (FE) and the Security and Intelligence Service (PET) pointing to rising Russian hybrid activity against Denmark and other NATO states, alongside information on concrete Russian planning for sabotage. The agency says destructive operations against Danish targets in the coming months are likely, and names wipers and OT manipulation as the methods — citing the late-2024 compromise of a small Danish waterworks by pro-Russian actors that manipulated water pressure and cut supply to about 450 households, and the December 2025 attack on Poland's energy sector that authorities averted. CERT.dk · Nordics
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