This intelligence brief highlights major December 2025 developments, including Group‑IB’s 2026 predictions that AI‑driven autonomous attacks, agentic extortion, and automated exploitation of APIs, crypto platforms, and identity systems will redefine global cyber risks. It stresses the need for real‑time, collaborative defenses as cybercrime accelerates. The month also saw the discovery of CVE‑2025‑55182, a critical CVSS 10.0 React2Shell vulnerability in React Server Components that enables unauthenticated remote code execution through a single crafted request, posing severe risks to internet‑exposed applications due to its ease of exploitation and potential for rapid large‑scale compromise.

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