Siemens (CVE-2025-49794)

critical Tenable OT Security Plugin ID 505453

Synopsis

The remote OT asset is affected by a vulnerability.

Description

A use-after-free vulnerability was found in libxml2. This issue occurs when parsing XPath elements under certain circumstances when the XML schematron has the <sch:name path=.../> schema elements. This flaw allows a malicious actor to craft a malicious XML document used as input for libxml, resulting in the program's crash using libxml or other possible undefined behaviors.

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

Solution

Refer to the vendor advisory.

Plugin Details

Severity: Critical

ID: 505453

File Name: tenable_ot_siemens_CVE-2025-49794.nasl

Version: 1.1

Type: Remote

Family: Tenable.ot

Published: 6/18/2026

Updated: 6/18/2026

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Medium

Score: 6.0

CVSS v3

Risk Factor: Critical

Base Score: 9.1

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

Vulnerability Information

CPE: cpe:/o:siemens:ruggedcom_rox_mx5000_firmware, cpe:/o:siemens:ruggedcom_rox_rx1400_firmware, cpe:/o:siemens:ruggedcom_rox_rx1500_firmware, cpe:/o:siemens:ruggedcom_rox_rx1501_firmware, cpe:/o:siemens:ruggedcom_rox_rx1510_firmware, cpe:/o:siemens:ruggedcom_rox_rx1511_firmware, cpe:/o:siemens:ruggedcom_rox_rx1512_firmware, cpe:/o:siemens:ruggedcom_rox_rx5000_firmware, cpe:/o:siemens:ruggedcom_rox_rx1524_firmware, cpe:/o:siemens:ruggedcom_rox_rx1536_firmware, cpe:/o:siemens:ruggedcom_rox_mx5000re_firmware

Required KB Items: Tenable.ot/Siemens

Exploit Ease: No known exploits are available

Patch Publication Date: 5/12/2026

Vulnerability Publication Date: 6/16/2025

Reference Information

CVE: CVE-2025-49794

CWE: 825

Detections

Analytics