---
id: CVE-2026-25786
title: "Affected devices do not properly validate and sanitize PLC/station name rendered on the \"communication\" parameters page of the web interface.\r\nThis could allow an authenticated attacker who is authorized to download a TIA project into th…"
summary: "Affected devices do not properly validate and sanitize PLC/station name rendered on the \"communication\" parameters page of the web interface.\r\nThis could allow an authenticated attacker who is authorized to download a TIA project into th…"
severity: critical
cvss: 9.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H'
cwe:
  - CWE-79
published: '2026-05-12'
updated: '2026-07-14'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-25786'
references:
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-688146.html'
    label: productcert@siemens.com
tags:
  - nvd
epss: 0.0037
epssPercentile: 0.30942
ingestedAt: '2026-07-14T10:36:25.488Z'
---

## Overview

Affected devices do not properly validate and sanitize PLC/station name rendered on the "communication" parameters page of the web interface.
This could allow an authenticated attacker who is authorized to download a TIA project into the product, to inject malicious scripts into the page.
If a benign user with appropriate rights accesses the "communication" parameters page, the malicious code would be executed in the scope of their web session.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.