CVE-2024-43392

Phoenix Contact: Firewall reconfiguration through the FW_environment variables in MGUARD devices

8.1 High

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 environment variable which can lead to a DoS.

Attack profile

How easy it is to exploit

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

What an attacker can affect

Confidentiality: None
Integrity: High
Availability: High

Exploit likelihood

0.52%Up 0.5 points since Sep 11, 2024

What each source reports

CVE List Score used 8.1

Phoenix Contact: Firewall reconfiguration through the FW_environment variables in MGUARD devices

Record: CVE-2024-43392
CVSS 3.1: 8.1 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Weakness: CWE-94
Updated: 2026-11-02

EUVDEUVD-2024-40265 8.1

Record: EUVD-2024-40265
CVSS 3.1: 8.1 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-c4g6-rrx2-j7rm 6.5

A low privileged remote attacker can perform configuration changes of the firewall services,...

Record: GHSA-c4g6-rrx2-j7rm
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-74, CWE-94
Updated: 2026-11-02

NVD 8.1

Record: CVE-2024-43392
CVSS 3.1: 8.1 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Weakness: CWE-94
Updated: 2026-11-02

Affected products

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History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD

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

In short

CVE-2024-43392 is a high vulnerability (CVSS 8.1) in Phoenix Contact Fl Mguard 2102, published September 10, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.52%, the 44th percentile. No source names a fixed version.