Zenitel TCIV-3+ 2025: Critical ICS Vulnerabilities Enable Remote Attacks
In November 2025, Zenitel disclosed multiple critical vulnerabilities affecting its TCIV-3+ intercom systems, widely deployed in communications-critical infrastructure worldwide. Security researchers from Claroty Team82 identified three separate OS command injection flaws (CVE-2025-64126, -64127, -64128), as well as a severe out-of-bounds write and a reflected cross-site scripting vulnerability. These issues allowed threat actors to remotely execute arbitrary code or cause denial-of-service conditions without authentication, putting operational technology environments at significant risk of disruption or compromise. The vulnerabilities require only low-complexity attacks and no user interaction, amplifying their business impact. This incident highlights the ongoing critical importance of securing industrial control system components exposed to remote exploitation. With threat actors increasingly targeting IoT and OT devices in critical communications infrastructure, these types of vulnerabilities are seeing a dramatic rise globally, and patching urgency is at an all-time high.
Kill Chain
