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Malicious AI Assistant Extensions Harvest LLM Chat Histories | Microsoft Security Blog
www.microsoft.com

Malicious AI Assistant Extensions Harvest LLM Chat Histories | Microsoft Security Blog

Malicious AI browser extensions collected LLM chat histories and browsing data from platforms such as ChatGPT and DeepSeek. With nearly 900,000 installs and activity across more than 20,000 enterprise tenants, the campaign highlights the growing risk of data exposure through browser extensions.

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https://www.microsoft.com/en-us/security/blog/2026/03/05/malicious-ai-assistant-extensions-harvest-llm-chat-histories/

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