CVE-2026-72530: trueconf server — Actively Exploited

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.

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CVSS v3.1 Score

9.0

CRITICAL

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

EPSS — Exploit Prediction

0.0183

Probability of exploitation

0.77%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

CISA Known Exploited Vulnerability

This vulnerability is actively exploited in the wild.

Added: Aug 20, 2026 Remediation due: Sep 3, 2026

Weakness Type (CWE)

CWE-94 CWE-94

Affected Products

Vendor	Product	Versions
trueconf	trueconf_server	< 5.3.9.10013
trueconf	trueconf_server	< 5.3.9.10015
trueconf	trueconf_server	5.4.0.12689 — 5.4.9.10072
trueconf	trueconf_server	5.4.0.12700 — 5.4.9.10019
trueconf	trueconf_server	5.5.0.13826 — 5.5.5.10010
trueconf	trueconf_server	5.5.0.13828 — 5.5.5.10009

References

Exploits

https://securelist.com/tr/head-mare-targets-trueconf-server-with-phantomcore/120988/

Other References

https://ics-cert.kaspersky.com/advisories/2026/08/11/trueconf-server-breakout-from-isolated-environment/ https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-72530

Frequently Asked Questions

What is CVE-2026-72530? +

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. It has a CVSS v3.1 base score of 9.0 (CRITICAL). This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog, indicating active exploitation in the wild.

How severe is CVE-2026-72530? +

CVE-2026-72530 has a CVSS v3.1 score of 9.0 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately. The EPSS score is 0.0183, placing it in the 1th percentile for exploitation probability.

What products are affected by CVE-2026-72530? +

CVE-2026-72530 affects products from trueconf, specifically: trueconf_server. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-72530? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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