'Conversation Overflow' Cyberattacks Bypass AI Security to Target Execs

Conversation Overflow is a phishing technique that embeds visible malicious prompts with large amounts of hidden, benign-looking text to trick AI/ML email-security into treating the entire message as a normal conversation; attackers then use follow-up messages to harvest credentials from targeted executives. SlashNext researchers report multiple observed tests of this method and recommend active adversarial testing, ongoing vigilance, and investment in ML/AI-enabled defenses while monitoring alternate channels like SMS and collaboration chat.