Critical Vulnerabilities in TrueConf Server Exploited via TCP Port 4307

Two critical vulnerabilities, CVE-2026-72530 and CVE-2026-72529, have been identified in TrueConf server versions 5.3.X to 5.5.5, allowing remote unauthorized attackers to exploit the server via TCP port 4307. CVE-2026-72530 enables attackers to execute arbitrary code by breaking out of an isolated environment, while CVE-2026-72529 allows script execution through an undocumented function. Both vulnerabilities were published on 2026-08-19 and added to the CISA Known Exploited Vulnerabilities catalog on 2026-08-20 due to active exploitation. Organizations using affected TrueConf server versions are at significant risk and are advised to review CISA's guidance for mitigation. Immediate action is recommended to secure systems against these vulnerabilities.

Key Points: • CVE-2026-72530 and CVE-2026-72529 affect TrueConf server versions 5.3.X to 5.5.5. • Both vulnerabilities allow remote code execution via TCP port 4307. • CISA added these vulnerabilities to its KEV catalog due to active exploitation.