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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
High
Difficult to exploit
Attack Requirements
Present
Additional conditions required
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products 6
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Trueconf Trueconf_Server
cpe:2.3:a:trueconf:trueconf_server:*:*:*:*:*:windows:*:*
|
— |
5.3.9.10013
|
|
Trueconf Trueconf_Server
cpe:2.3:a:trueconf:trueconf_server:*:*:*:*:*:linux_kernel:*:*
|
— |
5.3.9.10015
|
|
Trueconf Trueconf_Server
cpe:2.3:a:trueconf:trueconf_server:*:*:*:*:*:windows:*:*
|
5.4.0.12689
|
5.4.9.10072
|
|
Trueconf Trueconf_Server
cpe:2.3:a:trueconf:trueconf_server:*:*:*:*:*:linux_kernel:*:*
|
5.4.0.12700
|
5.4.9.10019
|
|
Trueconf Trueconf_Server
cpe:2.3:a:trueconf:trueconf_server:*:*:*:*:*:windows:*:*
|
5.5.0.13826
|
5.5.5.10010
|
|
Trueconf Trueconf_Server
cpe:2.3:a:trueconf:trueconf_server:*:*:*:*:*:linux_kernel:*:*
|
5.5.0.13828
|
5.5.5.10009
|
References 3
https://ics-cert.kaspersky.com/advisories/2026/08/11/trueconf-server-breakout-f…
vulnerability@kaspersky.com
https://securelist.com/tr/head-mare-targets-trueconf-server-with-phantomcore/12…
134c704f-9b21-4f2e-91b3-4a467353bcc0
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026…
134c704f-9b21-4f2e-91b3-4a467353bcc0