The incident involved Meta's Muse Spark AI model and occurred during an evaluation conducted by independent cybersecurity testing firm Irregular, the company said Wednesday. "A misconfiguration by Irregular, an independent testing company Meta uses, inadvertently allowed one of our models access to the internet during evaluation," a Meta spokesperson said. The Information, which first reported the incident, said Meta's AI model breached the systems of an unnamed company and made changes to its internal environment during the test. A person familiar with the matter told CNN that some advanced AI models are intentionally granted limited internet access during testing to simulate real-world cyberattack scenarios. The disclosure makes Meta the third major AI developer in recent weeks to report an AI model compromising another organization's systems during controlled testing.