Hitachi Energy RTU500 Download of Code Without Integrity Check (CVE-2023-46143)

high Tenable OT Security Plugin ID 506488

Synopsis

The remote OT asset is affected by a vulnerability.

Description

A download of code without integrity check vulnerability in Hitachi Energy RTU500 allows an unauthenticated remote attacker to modify some or all applications running on the device. Successful exploitation could result in unauthorized modification of device functionality or disruption of its intended operation.

According to Hitachi Energy, RTU500 series CMU firmware versions 11.x and prior are affected. All affected versions are End-of-Life.

This plugin only works with Tenable.ot.
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Solution

Upgrade the RTU500 series CMU firmware to a supported version (12.7.8, 13.9.1 or later) as recommended in the Hitachi Energy advisory, and apply the general mitigation factors described in the advisory.

Plugin Details

Severity: High

ID: 506488

File Name: tenable_ot_abb_CVE-2023-46143.nasl

Version: 1.1

Type: Remote

Family: Tenable.ot

Published: 10/27/2026

Updated: 10/27/2026

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.68

CVSS v3

Risk Factor: High

Base Score: 7.5

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

Vulnerability Information

CPE: cpe:/o:hitachienergy:rtu500_firmware

Required KB Items: Tenable.ot/ABB

Exploit Ease: No known exploits are available

Patch Publication Date: 9/29/2026

Vulnerability Publication Date: 12/14/2023

Reference Information

CVE: CVE-2023-46143

CWE: 494

ICSA: 26-279-06

Detections

Analytics