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Zenitel TCIV-3+ intercom devices have been found to contain multiple critical vulnerabilities, including OS command injection, out-of-bounds write, and cross-site scripting flaws. These vulnerabilities, affecting all versions prior to 9.3.3.0, can be exploited remotely with low attack complexity, potentially allowing unauthenticated attackers to execute arbitrary code or cause denial-of-service conditions. The vulnerabilities have been assigned a maximum CVSS v4 base score of 10.0, highlighting the severe risk to organizations deploying these devices in industrial and critical infrastructure environments.
Security advisories urge immediate patching and mitigation, as exploitation could compromise the integrity and availability of communication systems. The flaws were disclosed in both a dedicated CISA ICS advisory and independent security reporting, emphasizing the urgency for asset owners to review and apply available updates. Organizations are advised to minimize network exposure and ensure that affected devices are not accessible from the internet to reduce the risk of exploitation.
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CISA issued advisory ICSA-25-329-03 warning that the Zenitel TCIV-3+ flaws affect communications-sector infrastructure worldwide and urging organizations to upgrade immediately and follow ICS network security mitigations. As of publication, CISA said no public exploitation had been reported.
Zenitel made a fix available in version 9.3.3.0 to address the reported TCIV-3+ vulnerabilities. The flaws could enable remote code execution, denial of service, or JavaScript execution without authentication.
Nir Tepper and Noam Moshe of Claroty Team82 identified and reported five vulnerabilities in Zenitel TCIV-3+ devices, including three OS command injection flaws, an out-of-bounds write, and a reflected XSS issue affecting versions prior to 9.3.3.0.
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