Siemens Desigo PXC/PXM Controllers Out-of-bounds Read (CVE-2026-89208)

medium Tenable OT Security Plugin ID 506410

Synopsis

The remote OT asset is affected by a vulnerability.

Description

The affected product does not properly validate input bounds before accessing packet data. This could allow an unauthenticated remote attacker to trigger memory reads outside the intended packet boundaries.

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: Medium

ID: 506410

File Name: tenable_ot_siemens_CVE-2026-89208.nasl

Version: 1.1

Type: Remote

Family: Tenable.ot

Published: 10/20/2026

Updated: 10/20/2026

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Low

Score: 1.2

Percentile: 0.01

CVSS v3

Risk Factor: Medium

Base Score: 5.3

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

Vulnerability Information

CPE: cpe:/o:siemens:desigo_pxc00-e.d_firmware, cpe:/o:siemens:desigo_pxc00-u_firmware, cpe:/o:siemens:desigo_pxc001-e.d_firmware, cpe:/o:siemens:desigo_pxc100-e.d_firmware, cpe:/o:siemens:desigo_pxc12-e.d_firmware, cpe:/o:siemens:desigo_pxc128-u_firmware, cpe:/o:siemens:desigo_pxc200-e.d_firmware, cpe:/o:siemens:desigo_pxc22-e.d_firmware, cpe:/o:siemens:desigo_pxc22.1-e.d_firmware, cpe:/o:siemens:desigo_pxc36.1-e.d_firmware, cpe:/o:siemens:desigo_pxc50-e.d_firmware, cpe:/o:siemens:desigo_pxc64-u_firmware, cpe:/o:siemens:desigo_pxm20-e_firmware

Required KB Items: Tenable.ot/Siemens

Exploit Ease: No known exploits are available

Patch Publication Date: 10/13/2026

Vulnerability Publication Date: 10/13/2026

Reference Information

CVE: CVE-2026-89208

CWE: 125

Detections

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