CVE-2024-38501

Pepperl+Fuchs RX/EN1 - EIP/Modbus — vulnerability CVE-2024-38501

An unauthenticated remote attacker may use a HTML injection vulnerability with limited length to inject malicious HTML code and gain low-privileged access on the affected device.

CVSS 6.1Patch available

This record: live connection— last retrieved: 7 November 2026 at 03:37.

Vendor

Pepperl+Fuchs

Products

RX/EN1 - EIP/Modbus, RX/EN - EtherNet/IP, RX/MOD Modbus TCP/Server/Router, RX/PN1 - PROFINET/Modbus, RX/PN - PROFINET, RX/TCP SocketServer

up to version <v1.08

Published

13 August 2024

Last modified

17 June 2026

Original source information

Taken directly from NVD, CISA or the vendor — sometimes in English, unchanged from the source.

Technical description

An unauthenticated remote attacker may use a HTML injection vulnerability with limited length to inject malicious HTML code and gain low-privileged access on the affected device.

CVSS 3.1 — vector details

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack vector

NETWORK

Privileges required

NONE

User interaction

REQUIRED

Confidentiality

Limited

Integrity

Limited

Availability

None

EPSS — Exploit Prediction Scoring System

Probability of exploitation within 30 days

0.3%

Percentile

26e

Source: FIRST.org, updated on 6 November 2026.

Patch information

Update to a new version of the firmware you are using: * SocketServer v11.66 * PROFINET v3.4.10 * PROFINET/Modbus v1.0.8 * EtherNet/IP v7.23 * EIP/Modbus v1.09 * Modbus Router v7.10 * Modbus Server v7.12 * Modbus TCP v7.12

IACS Radar assessment

Our own interpretation and context for the source data above.

IACS Radar assessment

Our own interpretation and context for this vulnerability — not an official source.

IACS Radar priority score

41/ 100

Based on CVSS 6.1, EPSS 0.3%, industrial relevance 45/100; raised due to relevance to internet exposure.

Combines CVSS, EPSS, KEV status, industrial relevance and exposure relevance — a complement to, not a replacement for, the individual scores below and above.

Conditions for exploitation

•Network access to the affected device or segment is required.
•No valid credentials are needed.
•User interaction (for example opening a file) is required.

Operational impact & energy relevance

Limited impact on availability; the risk lies mainly with confidentiality or integrity of process data.

No strong energy-sector-specific signals recognised; general OT/ICS relevance.

This product uses protocols that are relevant to internet exposure analysis. An internet-reachable service is not automatically vulnerable.

Recommended defensive measures

•Apply the latest firmware or software update and validate its integrity.
•Restrict network access to the affected device to a dedicated OT management segment.
•Implement network segmentation in line with zones and conduits (IEC 62443-3-2).
•Monitor for abnormal protocol traffic using an OT-aware detection system.

Industrial relevance score

45/ 100

• Mentioned in an official CISA ICS advisory, which confirms direct relevance to industrial control systems.
• Description mentions industrial protocol: modbus-tcp.

Classification is provisional; manual verification by an OT security analyst is recommended.

Classified by IACS Radar-analysepijplijn (geautomatiseerd) on 7 November 2026.

IEC 62443 mapping

IEC 62443-4-1FR3 · Systeemintegriteit

Automatic IACS Radar assessment based on the reported CWE weakness classification; not an official certification statement.

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