Researchers Demonstrate GPT-5.5's Potential to Execute Full Cyber-Attack Chains

Cybersecurity researchers tested the offensive cyber capabilities of OpenAI’s GPT-5.5, demonstrating that a single prompt could enable the model to execute a full cyber-attack chain. The findings highlight the potential for frontier large language models (LLMs) to be leveraged by malicious actors for hacking purposes. No specific technical details, such as attack methodologies, CVEs, or dates, were provided in the reported results. The research underscores the growing concern over AI-driven cyber threats without outlining explicit impacts or affected systems. The testing focused on evaluating the model’s ability to autonomously conduct multi-stage attacks.