Siemens SCALANCE X Switches, RUGGEDCOM WiMAX, RFID 181-EIP, and SIMATIC RF182C Heap-Based Buffer Overflow (CVE-2018-4833)

high Tenable OT Security Plugin ID 500746


The remote OT asset is affected by a vulnerability.


A vulnerability has been identified in RFID 181EIP (All versions), RUGGEDCOM Win (V4.4, V4.5, V5.0, and V5.1), SCALANCE X-200 switch family (incl. SIPLUS NET variants) (All versions < V5.2.3), SCALANCE X-200IRT switch family (incl. SIPLUS NET variants) (All versions < V5.4.1), SCALANCE X-200RNA switch family (All versions < V3.2.6), SCALANCE X-300 switch family (incl. SIPLUS NET variants) (All versions < V4.1.3), SCALANCE X408 (All versions < V4.1.3), SCALANCE X414 (All versions), SIMATIC RF182C (All versions). Unprivileged remote attackers located in the same local network segment (OSI Layer 2) could gain remote code execution on the affected products by sending a specially crafted DHCP response to a client's DHCP request.

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The following text was originally created by the Cybersecurity and Infrastructure Security Agency (CISA). The original can be found at

Siemens has provided updates for the following products to fix the vulnerability:

- RUGGEDCOM Win: Update to v5.2
- SCALANCE X-200: Update to v5.2.3
- SCALANCE X-200 IRT: Update to v5.4.1
- SCALANCE X-200RNA: Update to v3.2.6
- SCALANCE X-300 & SCALANCE X408: Update to v4.1.3

Siemens has identified the following specific workarounds and mitigations users can apply to reduce the risk:

- Use static IP addresses instead of DHCP
- Apply cell protection concept.
- Apply Defense-in-Depth.

- For SIMATIC RF182C and RFID 181EIP: Migrate to a successor product within the SIMATIC RF18xC/CI family, v1.3 or later version. For details refer to the phase-out announcement.

As a general security measure, Siemens strongly recommends users protect network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends users configure the environment according to Siemens’ operational guidelines for Industrial Security, and follow the recommendations in the product manuals.

Additional information on Industrial Security by Siemens can be found at:

For more information on this vulnerability and associated software updates, please see Siemens security advisory SSA-181018

See Also

Plugin Details

Severity: High

ID: 500746

Version: 1.6

Type: remote

Family: Tenable.ot

Published: 1/25/2023

Updated: 3/4/2024

Supported Sensors: Tenable OT Security

Risk Information


Risk Factor: Medium

Score: 5.9


Risk Factor: Medium

Base Score: 5.8

Temporal Score: 4.3

Vector: CVSS2#AV:A/AC:L/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2018-4833


Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:siemens:scalance_x200_series_firmware, cpe:/o:siemens:scalance_x200irt_series_firmware, cpe:/o:siemens:scalance_x204rna_firmware:-, cpe:/o:siemens:scalance_x300_series_firmware:-, cpe:/o:siemens:scalance_x408_firmware:-, cpe:/o:siemens:scalance_x414_firmware:-

Required KB Items: Tenable.ot/Siemens

Exploit Ease: No known exploits are available

Patch Publication Date: 6/14/2018

Vulnerability Publication Date: 6/14/2018

Reference Information

CVE: CVE-2018-4833

CWE: 122