Microsoft's May 2026 Patch Tuesday addressed 118 security vulnerabilities, including 16 critical flaws, but notably contained no zero-day exploits — a rare occurrence in nearly two years. The surge in patching activity across major tech companies, including Apple, Google, Mozilla, and Oracle, is largely attributed to "Project Glasswing," an AI vulnerability-detection tool developed by Anthropic that has proven highly effective at identifying security flaws in code. The tool has dramatically increased the volume and pace of security patches industry-wide, with Mozilla fixing 271 vulnerabilities in Firefox 150 and Google patching 127 Chrome flaws in a single update.
