Description
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.
Metrics
CVSS 3.1 9.0/10
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| TrueConf | TrueConf Server | < 5.3; >= 5.3, < 5.3.9; >= 5.4, < 5.4.9; >= 5.5, < 5.5.5 |
References
- https://ics-cert.kaspersky.com/advisories/2026/08/11/trueconf-server-breakout-from-isolated-environment/Third Party Advisory
- https://securelist.com/tr/head-mare-targets-trueconf-server-with-phantomcore/120988/Exploit, Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-72530US Government Resource
Timeline
- Published
- Aug 19, 2026
- Last modified
- Aug 21, 2026
- Added to CISA KEV
- Aug 20, 2026
- NVD status
- Analyzed