CVE-2026-72530

Undergoing Analysis
Published: 19 Aug 2026, 16:56
Last modified:20 Aug 2026, 17:48

Vulnerability Summary

Overall Risk (default)
high
70/100
CVSS Score
9.5 CRITICAL
v4.0 (cve.org)
EPSS Score
0.34% LOW
0% probability
KEV
Listed
CISA
1 listing
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

19 Aug 2026, 16:56
Published
Vulnerability first disclosed
20 Aug 2026, 00:00
Added to CISA KEV
TrueConf Server Code Injection Vulnerability
20 Aug 2026, 17:48
Last Modified
Vulnerability information updated
03 Sept 2026, 00:00
CISA Remediation Due
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

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 Metrics

  • v4.0•CRITICAL•Score: 9.5CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
  • v4.0•CRITICAL•Score: 9.5CVSS: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
  • v3.1•CRITICAL•Score: 9CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.34%• Percentile: 27%

Techniques & Countermeasures

  • CWE-94•Improper Control of Generation of Code ('Code Injection')

    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.

Affected Systems

  • trueconf•trueconf_server

    < 5.3 | ≥ 5.3, < 5.3.9 | ≥ 5.4, < 5.4.9 | ≥ 5.5, < 5.5.5

References (3)