Detections
Analytics

Hitachi Energy RTU500 Product Uncontrolled Recursion (CVE-2024-8176)

high Tenable OT Security Plugin ID 505227

Synopsis

The remote OT asset is affected by a vulnerability.

Description

A stack overflow vulnerability exists in the libexpat library due to the way it handles recursive entity expansion in XML documents. When parsing an XML document with deeply nested entity references, libexpat can be forced to recurse indefinitely, exhausting the stack space and causing a crash. This issue could lead to denial of service (DoS) or, in some cases, exploitable memory corruption, depending on the environment and library usage. Product is only affected if IEC61850 functionality is configured.

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.

See Also

http://www.nessus.org/u?c424473c

https://www.cisa.gov/news-events/ics-advisories/icsa-26-062-03

Plugin Details

Severity: High

ID: 505227

File Name: tenable_ot_abb_CVE-2024-8176.nasl

Version: 1.1

Type: remote

Family: Tenable.ot

Published: 3/10/2026

Updated: 3/10/2026

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

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:N/A:H

Vulnerability Information

CPE: cpe:/o:hitachienergy:rtu540_firmware:13.8.1, cpe:/o:hitachienergy:rtu560_firmware:12, cpe:/o:hitachienergy:rtu530_firmware:13.8.1, cpe:/o:hitachienergy:rtu520_firmware:13.8.1, cpe:/o:hitachienergy:rtu540_firmware:12, cpe:/o:hitachienergy:rtu520_firmware:12, cpe:/o:hitachienergy:rtu520_firmware:13, cpe:/o:hitachienergy:rtu540_firmware:13, cpe:/o:hitachienergy:rtu560_firmware:13, cpe:/o:hitachienergy:rtu530_firmware:12, cpe:/o:hitachienergy:rtu560_firmware:13.8.1, cpe:/o:hitachienergy:rtu530_firmware:13

Required KB Items: Tenable.ot/ABB

Exploit Ease: No known exploits are available

Patch Publication Date: 2/24/2026

Vulnerability Publication Date: 2/24/2026

Reference Information

CVE: CVE-2024-8176

CWE: 674

ICSA: 26-062-03