By Sohaib Shams
A wave of hoax bomb threats and cyber-attacks targeting critical infrastructure disrupted daily life across Europe this week, exposing vulnerabilities in modern systems and raising questions about the "grey zone" between peace and conflict.
Flight Disruptions Across Europe
At least 25 commercial flights were diverted or forced to make emergency landings on Thursday following bomb threats, adding to seven similar incidents on Tuesday. Investigators have not identified the actors behind the threats, which could range from hostile states to criminal gangs or individuals. Aviation experts noted the coordinated nature of the response suggests a potential level of coordination, though airlines receive bomb threats daily.
Cyber-Attacks on Refrigeration Systems
Simultaneously, supermarket freezers and cold storage facilities in seven European countries malfunctioned after hackers remotely raised thermostat temperatures to as high as 50°C. Targets included France's national blood service cold storage. Cybersecurity researchers noted similarities to operations linked to Russia, though criminal gangs and "troublesome teenagers" are also possible culprits.
Grey Zone Warfare and Hybrid Threats
Security analysts describe these incidents as part of a "grey zone" — an ambiguous space between routine peace and conventional military conflict where proxies avoid state accountability. Since 2022, European states have faced intensifying sabotage believed to trace back to Russia but remaining below the threshold for military response, a so-called hybrid or "shadow war" aimed at disrupting support for Ukraine.
Security Response and Infrastructure Vulnerability
UK security agencies monitor about 3,000 active subjects of interest, but lower-level activity is harder to detect. Experts highlight that many hacks exploit edge devices — internet-connected items lacking processing power and security updates. The average vulnerability rate is one per 1,500 lines of code, making attacks opportunistic but increasingly frequent.
Preparedness Advice and Public Resilience
Governments across Europe advise citizens to stockpile 72 hours of emergency supplies. However, experts caution against panic, noting that while cyber-attacks cause psychological impact, they typically do not cause months-long outages like physical bombing. The primary goal of such terrorism is to generate fear, making calm resilience the first line of defense.
