Rockwell Automation Stratix 5950 Secure Boot Hardware Tampering (CVE-2019-1649)

medium Tenable OT Security Plugin ID 504956

Synopsis

The remote OT asset is affected by a vulnerability.

Description

Cisco Systems, Inc. (Cisco) released an advisory regarding a vulnerability in the logic that handles access control to a hardware component in Cisco's proprietary Secure Boot implementation. If successfully exploited, an attacker could write a modified firmware image to the component. The Allen-Bradley Stratix 5950 utilizes Cisco's proprietary Secure Boot implementation.

Customers using affected versions of this product are encouraged to evaluate the mitigations provided below and apply any appropriate mitigations to their deployed products. Additional details relating to the discovered vulnerability, including affected products and recommended countermeasures, are provided below.

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

Solution

Customers using the affected devices are encouraged to update to an available firmware revision that addresses the associated risk and are encouraged when possible, to combine this guidance with the general security guidelines to employ multiple strategies simultaneously.

See Rockwell Automation's security advisory for more information.

Plugin Details

Severity: Medium

ID: 504956

Version: 1.1

Type: remote

Family: Tenable.ot

Published: 1/16/2026

Updated: 1/16/2026

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v3

Risk Factor: Medium

Base Score: 6.7

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

Vulnerability Information

CPE: cpe:/h:rockwellautomation:allen-bradley_1783-sad2t2spk9_stratix_5950_industrial_managed_ethernet_switch, cpe:/h:rockwellautomation:allen-bradley_1783-sad4t0spk9_stratix_5950_industrial_managed_ethernet_switch, cpe:/h:rockwellautomation:allen-bradley_1783-sad2t2sbk9_stratix_5950_industrial_managed_ethernet_switch, cpe:/h:rockwellautomation:allen-bradley_1783-sad4t0sbk9_stratix_5950_industrial_managed_ethernet_switch

Required KB Items: Tenable.ot/Rockwell

Exploit Ease: No known exploits are available

Patch Publication Date: 10/3/2020

Vulnerability Publication Date: 10/3/2020

Reference Information

CVE: CVE-2019-1649

CWE: 284

ICSA: 20-072-03

Detections

Analytics