Hitachi Energy RTU500 Product Allocation of Resources Without Limits or Throttling (CVE-2025-59375)

high Tenable OT Security Plugin ID 505228

Synopsis

The remote OT asset is affected by a vulnerability.

Description

libexpat in Expat before 2.7.2 allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing. 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.

Plugin Details

Severity: High

ID: 505228

File Name: tenable_ot_abb_CVE-2025-59375.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-2025-59375

CWE: 770

ICSA: 26-062-03

Detections

Analytics