How a $500 GPU Hack Turns LLMs into Hidden Advertising Engines

A recent arXiv paper reveals that with an RTX 4070, a few hundred toxic training samples, and just one hour of fine‑tuning, attackers can embed covert advertisements into large language models like Gemini 2.5, creating cheap, undetectable AI‑driven ad platforms.

AI SafetyLLM Securityadvertisement embedding attack

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How a $500 GPU Hack Turns LLMs into Hidden Advertising Engines