The WebEx Chrome Extension Vulnerability and the Power of Virtual Patching

A WebEx Chrome extension vulnerability enables drive-by remote code execution by triggering Native Messaging with a specific "magic" URL pattern; a public proof-of-concept demonstrates executing commands (e.g., calc.exe). Cisco patched the extension, but many users remain exposed until they restart/update Chrome; recommended mitigations include updating the extension and applying network-level virtual patching (URL/IPS filters or SWG blocks for the magic pattern).