Microsoft is testing an AI-driven security system called MDASH, short for multi-model agentic scanning harness, designed to help discover and remediate vulnerabilities at scale. Microsoft describes MDASH as model-agnostic, using purpose-built AI agents to support vulnerability identification across Windows components. According to reporting, MDASH is in a limited private preview with some customers. In conjunction with its testing, Microsoft says the system has already assisted in locating 16 Windows vulnerabilities that Microsoft later addresses through Patch Tuesday updates. The coverage includes four vulnerabilities rated critical, with the remaining issues carrying lower severity levels. While Microsoft presents MDASH as an approach to accelerate security work, details of how the system operates beyond agentic, multi-model scanning are limited in the available reports. Overall, the sources agree that MDASH is a new AI platform under preview and that its use is linked to the identification and fixing of a set of Windows flaws delivered in the latest Patch Tuesday cycle.