Cyber Resilience

CVE-2026-72530

RCE in Trueconf Server ≤ 5.3.9.10013

CISA KEVActive ExploitationEUVD ExploitedPublic PoCRCE
Published
19 August 2026
Modified
21 August 2026
KEV Added
20 August 2026
CVSS Score v4 9.5
Click a component to see what it means
Raw vectorCVSS: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
EPSS Score 0.0097 59th percentile
Risk Priority 75 floored blend · peak EPSS

Summary

CVE-2026-72530 is a critical-severity Code Injection (CWE-94) vulnerability in Trueconf Trueconf Server. Its CVSS base score is 9.5 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Command and Scripting Interpreter (T1059); ranked in the top 41% of CVEs by exploit likelihood; CISA has added it to the Known Exploited Vulnerabilities catalog; a public proof-of-concept is referenced.

The strongest mitigations our analysis identified map to SA-11 (Developer Testing and Evaluation) and SI-10 (Information Input Validation) — see the control section below for these in your framework.

OWASP Top 10 for Web (2025)

A05:2025 Injection

EU & UK References

Vulnerability Data

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…

more

execute arbitrary code on the host system.

CWE(s)
CWE-94
KEV Date Added
20 August 2026

Related Threats

Threat-Actor AttributionAI

Head Mare
Kaspersky Securelist reports Head Mare targeted TrueConf Server with PhantomCore malware in connection with this isolated-environment breakout flaw.

MITRE ATT&CK Enterprise Techniques

T1059 Command and Scripting Interpreter Execution
Adversaries may abuse command and script interpreters to execute commands, scripts, or binaries.
attack.mitre.org →
T1059.001 PowerShell Execution
Adversaries may abuse PowerShell commands and scripts for execution.
attack.mitre.org →
T1059.002 AppleScript Execution
Adversaries may abuse AppleScript for execution.
attack.mitre.org →
T1059.004 Unix Shell Execution
Adversaries may abuse Unix shell commands and scripts for execution.
attack.mitre.org →
T1059.005 Visual Basic Execution
Adversaries may abuse Visual Basic (VB) for execution.
attack.mitre.org →
T1059.006 Python Execution
Adversaries may abuse Python commands and scripts for execution.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2026-72529Same product: Trueconf Trueconf Serverboth on KEV
CVE-2025-66824Same product: Trueconf Trueconf Server
CVE-2025-66823Same product: Trueconf Trueconf Server
CVE-2025-66834Same product: Trueconf Trueconf Server
CVE-2013-3906Shared CWE-94both on KEV
CVE-2017-9841Shared CWE-94both on KEV
CVE-2025-4428Shared CWE-94both on KEV
CVE-2009-0557Shared CWE-94both on KEV
CVE-2015-1635Shared CWE-94both on KEV
CVE-2024-20359Shared CWE-94both on KEV

Affected Assets

trueconf
trueconf server
≤ 5.3.9.10013 · ≤ 5.3.9.10015 · 5.4.0.12689 — 5.4.9.10072

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V1.3.1

Mitigating Controls (NIST 800-53 r5) AI

SA-11 Developer Testing and Evaluation good match

Developer testing and evaluation finds code paths that accept and execute externally influenced strings.

SI-10 Information Input Validation good match

Input validation directly stops untrusted data from being used to construct executable code without neutralization.

AC-6 Least Privilege partial match

Least privilege limits the damage an injected code fragment can perform once executed.

SA-15 Development Process, Standards, and Tools partial match

Requiring documented secure development standards and tools enforces use of safe code-generation APIs and escaping.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

PR.PS-06's SDLC practices directly target injection flaws via secure coding and testing (mostly), yet as a single broad outcome it leaves many code-generation specifics unaddressed (partial).

PR.DS-10 none match
prevents

PR.DS-10 protects runtime data confidentiality/integrity but has no bearing on neutralizing externally influenced input during code generation, so neither direction shows any preventive effect.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.28 Secure coding partial match
prevents

Banning unapproved code samples and unauthenticated web services, combined with secure-coding standards and SAST, prevents the dynamic generation or inclusion of attacker-supplied code.

References