Microsoft's New AI Security System Discovers 16 Windows CVEs, Scores 88% on Vulnerability Benchmark

May 14, 2026
Microsoft Security Blog
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Summary

Microsoft's new AI security system MDASH, orchestrating over 100 specialized agents, achieves an industry-leading 88.45% on a real-world vulnerability benchmark and directly uncovers 16 new Windows CVEs — including four Critical remote code execution flaws — patched in today's Patch Tuesday release.

Key Points

  • Microsoft unveils a new multi-model agentic security system called MDASH (Microsoft Security multi-model agentic scanning harness), which orchestrates over 100 specialized AI agents to discover, debate, and prove exploitable software vulnerabilities end-to-end.
  • MDASH achieves an industry-leading 88.45% score on the public CyberGym benchmark of 1,507 real-world vulnerabilities, and demonstrates 96% recall on five years of confirmed MSRC cases in clfs.sys and 100% in tcpip.sys, while finding all 21 planted vulnerabilities in a private test driver with zero false positives.
  • The system directly contributed to the discovery of 16 new CVEs in the Windows networking and authentication stack — including four Critical remote code execution flaws — patched in today's Patch Tuesday, with a limited private preview now open for customer sign-ups.

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