Detections
Analytics

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.

See Also

https://cert-portal.siemens.com/productcert/html/ssa-333035.html

Plugin Details

Severity: Medium

ID: 506410

File Name: tenable_ot_siemens_CVE-2026-89208.nasl

Version: 1.2

Type: Remote

Family: Tenable.ot

Published: 10/20/2026

Updated: 10/21/2026

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Low

Score: 1.2

Percentile: 0.01

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS Score Source: CVE-2026-89208

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: Medium

Base Score: 6.9

Threat Score: 2.7

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA: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