Siemens SIPROTEC 4 and SIPROTEC Compact Improper Authentication (CVE-2016-7114)

high Tenable OT Security Plugin ID 500101

Synopsis

The remote OT asset is affected by a vulnerability.

Description

A vulnerability has been identified in Firmware variant PROFINET IO for EN100 Ethernet module : All versions < V1.04.01;Firmware variant Modbus TCP for EN100 Ethernet module : All versions < V1.11.00; Firmware variant DNP3 TCP for EN100 Ethernet module : All versions < V1.03; Firmware variant IEC 104 for EN100 Ethernet module : All versions < V1.21; EN100 Ethernet module included in SIPROTEC Merging Unit 6MU80 : All versions < 1.02.02; SIPROTEC 7SJ686 :
All versions < V4.87; SIPROTEC 7UT686 : All versions < V 4.02; SIPROTEC 7SD686 : All versions < V 4.05; SIPROTEC 7SJ66 : All versions <V 4.30. Attackers with network access to the device's web interface (port 80/tcp) could possibly circumvent authentication and perform certain administrative operations. A legitimate user must be logged into the web interface for the attack to be successful.

This plugin only works with Tenable.ot. Please visit https://www.tenable.com/products/tenable-ot for more information.

Solution

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

Siemens provides updates for the following affected products and recommends users update to the latest version:

- Firmware variants for EN100 Ethernet modules as options for SIPROTEC 4 and SIPROTEC Compact:
- Firmware variant PROFINET IO: Update to V1.04.01
- Firmware variant Modbus TCP: Update to V1.11.00
- Firmware variant DNP3 TCP: Update to V1.03
- Firmware variant IEC 104: Update to V1.21

https://support.industry.siemens.com/cs/us/en/view/109745821

- EN100 Ethernet module included in SIPROTEC Merging Unit 6MU80: Update to firmware V1.02.02 by contacting the Siemens energy hotline at: [email protected]
- SIPROTEC 7SJ66: update to firmware V4.30

https://support.industry.siemens.com/cs/gb/en/view/109743555

- SIPROTEC 7SJ686: update to firmware V4.87

http://www.siemensenergysector.com/ProductRelatedDown.aspx?ProductId=51

- SIPROTEC 7UT686: update to firmware V4.02

http://www.siemensenergysector.com/ProductRelatedDown.aspx?ProductId=68

- SIPROTEC 7SD686: update to firmware V4.05

http://www.siemensenergysector.com/ProductRelatedDown.aspx?ProductId=64

Siemens is preparing updates for the remaining affected products and recommends the following mitigations in the meantime:

- Apply secure substation concepts and defense-in-depth measures.

Please see the specific product manual for more information. Manuals can be obtained from the downloads menu at the following Siemens website:

http://www.siemens.com/gridsecurity

- Restrict network access to Port 80/TCP and Port 50000/UDP

Siemens recommends users protect network access with appropriate mechanisms such as firewalls, segmentation, and VPNs.
Siemens also advises that users configure the operational environment according to Siemens’ Operational Guidelines for Industrial Security:

https://www.siemens.com/cert/operational-guidelines-industrial-security

For more information on this vulnerability and more detailed mitigation instructions, please see Siemens Security Advisory SSA-323211 at the following location:

http://www.siemens.com/cert/advisories

Plugin Details

Severity: High

ID: 500101

Version: 1.13

Type: remote

Family: Tenable.ot

Published: 2/7/2022

Updated: 8/9/2025

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 9

Temporal Score: 6.7

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

CVSS Score Source: CVE-2016-7114

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

Vector: CVSS:3.0/AV:N/AC:L/PR:L/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:siprotec_4_7ut686_firmware, cpe:/o:siemens:siprotec_4_7sj66_firmware, cpe:/o:siemens:siprotec_4_7sj686_firmware, cpe:/o:siemens:siprotec_4_7sd686_firmware

Required KB Items: Tenable.ot/Siemens

Exploit Ease: No known exploits are available

Patch Publication Date: 9/6/2016

Vulnerability Publication Date: 9/6/2016

Reference Information

CVE: CVE-2016-7114

CWE: 287

ICSA: 17-187-02, 17-187-03

Detections

Analytics