Cyber Resilience

CVE-2024-43393

RCE in Phoenixcontact Tc Mguard Rs4000 4G Vzw Vpn Firmware ≤ 8.9.3

RCE
Published
10 September 2024
Modified
22 August 2025
CVSS Score v3.1 8.1
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
EPSS Score 0.0052 41th percentile
Risk Priority 61 floored blend · peak EPSS

Summary

CVE-2024-43393 is a high-severity Code Injection (CWE-94) vulnerability in Phoenixcontact Tc Mguard Rs4000 4G Vzw Vpn Firmware. Its CVSS base score is 8.1 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Command and Scripting Interpreter (T1059); ranked at the 41th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

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 low privileged remote attacker can perform configuration changes of the firewall services, including packet filter, packet forwarding, network access control or NAT through the FW_INCOMING.FROM_IP FW_INCOMING.IN_IP FW_OUTGOING.FROM_IP FW_OUTGOING.IN_IP FW_RULESETS.FROM_IP FW_RULESETS.IN_IP environment variable which can lead to a DoS.

CWE(s)
CWE-94NVD-CWE-noinfo

Related Threats

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-2024-43390Same product: Phoenixcontact Fl Mguard 2102
CVE-2024-43391Same product: Phoenixcontact Fl Mguard 2102
CVE-2024-43388Same product: Phoenixcontact Fl Mguard 2102
CVE-2024-43389Same product: Phoenixcontact Fl Mguard 2102
CVE-2024-43392Same product: Phoenixcontact Fl Mguard Centerport Vpn-1000
CVE-2024-43385Same product: Phoenixcontact Fl Mguard 2102
CVE-2024-43387Same product: Phoenixcontact Fl Mguard 2102
CVE-2024-43386Same product: Phoenixcontact Fl Mguard 2102
CVE-2024-7699Same product: Phoenixcontact Fl Mguard 2102
CVE-2024-7734Same product: Phoenixcontact Fl Mguard 2102

Affected Assets

phoenixcontact
tc mguard rs4000 4g vzw vpn firmware
≤ 8.9.3
phoenixcontact
tc mguard rs4000 4g vpn firmware
≤ 8.9.3
phoenixcontact
tc mguard rs4000 4g att vpn firmware
≤ 8.9.3
phoenixcontact
tc mguard rs4000 3g vpn firmware
≤ 8.9.3
phoenixcontact
tc mguard rs2000 4g vzw vpn firmware
≤ 8.9.3
phoenixcontact
tc mguard rs2000 4g vpn firmware
≤ 8.9.3
phoenixcontact
tc mguard rs2000 4g att vpn firmware
≤ 8.9.3
phoenixcontact
tc mguard rs2000 3g vpn firmware
≤ 8.9.3
phoenixcontact
fl mguard smart2 vpn firmware
≤ 8.9.3
phoenixcontact
fl mguard smart2 firmware
≤ 8.9.3
+26 more product configuration(s) — see NVD for full list

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.

A.8.7 Protection against malware none match
none

Controls that restrict unauthorized or malicious code from being introduced via external networks or removable media limit opportunities for an attacker to inject and execute arbitrary code.

References