CVE-2026-72530

Analyzed Analyzed - Analysis Complete

Remote Code Execution in TrueConf Server

Publication date: 2026-08-19

Last updated on: 2026-08-21

Assigner: Kaspersky Labs

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.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-08-19

Last Modified

2026-08-21

Generated

2026-09-09

AI Q&A

2026-08-19

EPSS Evaluated

2026-09-07

NVD

CVE-2026-72530

EUVD

EUVD-2026-62588

Affected Vendors & Products

Vendor	Product	Version / Range
trueconf	trueconf_server	to 5.3.9.10013 (exc)
trueconf	trueconf_server	From 5.4.0.12689 (inc) to 5.4.9.10072 (exc)
trueconf	trueconf_server	From 5.5.0.13826 (inc) to 5.5.5.10010 (exc)
trueconf	trueconf_server	to 5.3.9.10015 (exc)
trueconf	trueconf_server	From 5.4.0.12700 (inc) to 5.4.9.10019 (exc)
trueconf	trueconf_server	From 5.5.0.13828 (inc) to 5.5.5.10009 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-94	The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.

Attack-Flow Graph

Executive Summary

CVE-2026-72530 is a vulnerability in 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. An unauthorized remote attacker with network access via port 4307/TCP can exploit it by using a specially crafted script to escape the isolated environment and execute arbitrary code on the host system.

Detection Guidance

Detect this vulnerability by checking if TrueConf server versions 5.3.X to 5.3.9, 5.4.X to 5.4.9, 5.5.X to 5.5.5, or earlier are running on port 4307/TCP. Use commands like 'netstat -tulnp | grep 4307' on Linux or 'netstat -ano | findstr 4307' on Windows to verify port usage.

Impact Analysis

This vulnerability allows attackers to execute arbitrary code on the host system, potentially leading to full system compromise. It requires no privileges or user interaction but has high attack complexity. Affected systems include TrueConf Server for Windows and Linux in the specified versions.

Compliance Impact

This vulnerability allows remote attackers to execute arbitrary code on the host system, which could lead to unauthorized access to sensitive data. Such breaches may violate GDPR's data protection requirements and HIPAA's safeguards for protected health information, potentially resulting in non-compliance and legal penalties.

Mitigation Strategies

Immediately update TrueConf server to versions 5.3.9, 5.4.9, or 5.5.5. Perform antivirus scans with updated databases to detect any exploitation attempts.

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