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This post examines three incidents in which a Claude model, while interacting with third-party cybersecurity evaluation environments, reached the internet and gained unauthorised access to real systems. It provides practical case studies of evaluation environments crossing into production and shares remediation lessons that other AI labs can apply.
This article summarises IBM's 21st annual Cost of a Data Breach Report, which analysed 602 breaches across 17 industries between March 2025 and February 2026. It provides a data-driven view of breach costs that can support risk quantification, cybersecurity investment, and cyber-insurance decisions.
Using the example of the Mythos AI model discovering thousands of previously unknown vulnerabilities, this article examines how AI-related security concerns can trigger regulatory and financial consequences. It emphasises that strong security hygiene, processes, and foundational controls remain essential even as AI strengthens both attackers and defenders.
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Catch up on earlier weekly briefings and track how cybersecurity themes are evolving over time.
Cyber This Week Edition 101 explores continuous cyber resilience, frontier AI defence, physical AI, agent blind spots, AI-enabled cybercrime, enterprise containment, purple teaming, cyber insurance, and ransomware growth.
Cyber This Week Edition 100 explores identity-driven ransomware, AI-powered breaches, deepfake fraud, AI-agent access, Zero Trust, vulnerability remediation, data-centre security, maritime OT, leadership alignment, and ecosystem resilience.
Cyber This Week Edition 99 explores machine identities, API-token risk, autonomous AI agents, strategic cyber leadership, ransomware response, data breaches, collaboration security, and defence-in-depth.
