ThreatsIndustrial & OTHighJohnson Controls Metasys Building Automation Flaw Enables Administrative Session Hijacking CVE-2026-34491CISA ICS Advisory ICSA-26-225-14 warns of a high-severity stored XSS defect in Johnson Controls Metasys building automation systems risking administrative takeover.Mei-Lin Chen·27 Sep 2026, 08:00 IST·8 min read