Critical (9.5) in TrueConf Server. In CISA KEV since 2026-08-20. EPSS 1.7% chance of exploitation in the next 30 days.
A remote unauthorized attacker with network access via port 4307/TCP to the TrueConf server versions 5.3.X to 5.3.9, 5.4.X to 5.4.9, 5.5.X to 5.5.5, and earlier could use a specially crafted script to break out of the isolated environment and execute arbitrary code on the host system.