CVE-2026-72530

A remote unauthorized attacker with network access via port 4307/TCP to the TrueConf server...

9.5 CriticalIn KEVPublic exploit

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 profile

How easy it is to exploit

Attack vector: Network
Complexity: High
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

1.69%Up 1.3 points since Aug 20, 2026

What each source reports

CVE List Score used 9.5

Record: CVE-2026-72530
CVSS 4.0: 9.5 CriticalCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CVSS 3.1: 9.0 CriticalCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Weakness: CWE-94
Updated: 2026-11-02

EUVDEUVD-2026-62588 9.5

Record: EUVD-2026-62588
CVSS 4.0: 9.5 CriticalCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-f8q9-f337-2p3r 9.5

A remote unauthorized attacker with network access via port 4307/TCP to the TrueConf server...

Record: GHSA-f8q9-f337-2p3r
CVSS 4.0: 9.5 CriticalCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 9.0 CriticalCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Weakness: CWE-94
Updated: 2026-11-02

CISA KEV No score

TrueConf Server Code Injection Vulnerability

TrueConf Server contains a code injection vulnerability that could allow an unauthorized remote attacker with network access via port 4307/TCP to use a specially crafted script to break out of the isolated environment and execute arbitrary code on the host system.

Record: CVE-2026-72530
Weakness: CWE-94
Updated: 2026-11-02

NVD 9.5

Record: CVE-2026-72530
CVSS 4.0: 9.5 CriticalCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 9.0 CriticalCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Weakness: CWE-94
Updated: 2026-11-02

Affected products

trueconf server

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
PoC in GitHub	fevar54/CVE-2026-72530-TrueConf-Sandbox-Escape-	2026-08-25

History

History
Recorded	Changed	Sources
Nov 3, 2026	exploitation
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, CISA KEV, NVD, PoC in GitHub

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-72530 is a critical vulnerability (CVSS 9.5) in Trueconf Server, published August 19, 2026. CISA lists it as known to be exploited, since August 20, 2026. EUVD reports exploitation since August 20, 2026. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 1.69%, the 77th percentile. No source names a fixed version.