Incidents by attack type:
Around 14 March 2026, US ignition-interlock provider Intoxalock was hit by a DDoS-style flood that knocked its servers offline for about a week, disrupting calibration and account services and leaving an estimated 150,000 court-ordered drivers across 46 states unable to start their cars.
The pro-Russian hacktivist group Anonymous Sudan flooded Kenya's eCitizen government portal with DDoS traffic, knocking out access to roughly 5,000 public services and disrupting M-Pesa, electricity tokens and visa processing for days.
A massive multi-day DDoS attack on Greece's 'Subject Bank' (Trapeza Thematon) high-school exam platform disrupted nationwide exams with up to 280,000 connections per second and 165 million hits from 114 countries, the largest attack on a Greek public body.
A multi-wave distributed denial-of-service attack with traffic ten times the normal volume briefly disrupted Hungarian banking and telecom services, in what Magyar Telekom called one of the largest cyberattacks ever seen in Hungary.
A sustained volumetric DDoS campaign knocked New Zealand's stock exchange offline for parts of five consecutive trading days, halting trading because the exchange could not publish market announcements, and drawing a sharp regulatory rebuke.
A botched Mirai botnet campaign targeting a router exploit crashed roughly 900,000 Deutsche Telekom routers, knocking German customers offline for internet, phone, and TV over two days in November 2016.
A massive Mirai-botnet DDoS attack against managed DNS provider Dyn knocked Twitter, Netflix, Spotify, GitHub, Reddit, and dozens of other major sites offline across the U.S. and Europe, demonstrating how a botnet of compromised IoT devices could disrupt large swathes of the internet.
A two-week Anonymous-claimed DDoS campaign knocked Turkish banks' online and card-payment systems offline and hit the NIC.tr DNS infrastructure with a 40 Gbps flood, disrupting roughly 400,000 .tr domains nationwide.
A three-week wave of distributed denial-of-service attacks crippled Estonian government, banking, and media websites amid a dispute with Russia, becoming the first cyber assault on an entire nation-state and the birthplace of NATO's cyber-defence doctrine.