Daily OT Security News: October 17, 2026

This edition draws on sources published or updated October 7–16, 2026. The items were reported or updated on different dates; they are collected here for operational-security teams and should not be read as five developments that all broke today. 1. French supermarket refrigeration cyberattack disrupts physical operations A cyberattack disrupted refrigeration controls at hundreds of French supermarkets around October 11–12. Refrigerators and freezers reportedly heated to as much as 50°C, leading to food disposal; fires were also reported. The Paris prosecutor’s office described a large-scale attack on connected refrigerators, and ANSSI was tasked with investigating. Reported scale varies: Reuters cited at least 350 stores, while AP relayed a French minister’s estimate of about 700. Authorities said affected equipment included remote-control modules using Danfoss and Copeland software; Reuters also reported Dixell software. Danfoss…