CVE-2026-72530
CVSS Score
9.0
EPSS Score
0.3%
EPSS Percentile
27th
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.
| CWE | CWE-94 |
| Vendor | trueconf |
| Product | trueconf server |
| Published | Aug 19, 2026 |
| Last Updated | Aug 21, 2026 |
⚠️ Actively Exploited — Act Now
Get instant alerts for trueconf trueconf server
This vulnerability is actively exploited in the wild. Set up free real-time alerts so you're first to know about threats like CVE-2026-72530.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
TrueConf / TrueConf Server
* < 5.3 5.3 < 5.3.9 5.4 < 5.4.9 5.5 < 5.5.5
References
ics-cert.kaspersky.com: https://ics-cert.kaspersky.com/advisories/2026/08/11/trueconf-server-breakout-from-isolated-environment/ securelist.com: https://securelist.com/tr/head-mare-targets-trueconf-server-with-phantomcore/120988/ cisa.gov: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-72530
Credits
Vyacheslav Kopeytsev from Kaspersky ICS CERT