CVE-2026-72530

CRITICAL 9.0

CVSS Score

9.0

EPSS Score

0.0%

EPSS Percentile

0th

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 19, 2026

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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

NVD ↗ CVE.org ↗ EPSS Data ↗

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/

Credits

Vyacheslav Kopeytsev from Kaspersky ICS CERT