In a test of major LLMs, Zscaler found that some autonomous AI agents fell victim to frauds, reinforcing how easily some high-end enterprise agents can be conned by schemes that would fool few, if any, humans.
The security vendor looked at various forms of indirect prompt injection (IPI) traps and found that, whereas many models fell victim to the schemes, some of the lower-level LLMs fared better than their pricier siblings. 
The Zscaler testing found, for example, that four models were found to be “vulnerable”: Llama3-3-70b-instruct; Llama3-2-90b-instruct; Gemini-3-flash; and Gemini-2.5-pro. Three models were found to be “safe”: Llama4-maverick; Gemini-3.1-pro; and Gemini-3.1-flash-lite. T...