Cyber Brief 26-02 - January 2026

This Cyber Brief (January 2026) aggregates 268 open-source reports describing a wide range of cyber activity: state-linked espionage (China- and Russia-linked campaigns compromising telecoms, government, and congressional staff emails), active zero-day exploitation (Microsoft Office, Cisco UC/Webex), destructive attacks (Sandworm wiper against Polish renewable operators), large data exfiltrations and leaks (ESA 500GB, a 45M-record French data leak, Eurail breach), expansive botnet and malware campaigns (Kimwolf, MacSync, Mac/Windows stealers), plus numerous high-impact vulnerabilities and supply-chain issues; it also summarises related policy and law-enforcement actions across Europe and globally.