---
id: CVE-2026-34223
title: >-
  A vulnerability has been identified in Desigo CC ClickOnce Client V6 (All
  versions), Desigo CC ClickOnce Client V7 (All versions), Desigo CC family V8
  (All versions), Desigo CC family V9 (All versions), Desigo CC Flex Client V6
  (All vers…
summary: >-
  A vulnerability has been identified in Desigo CC ClickOnce Client V6 (All
  versions), Desigo CC ClickOnce Client V7 (All versions), Desigo CC family V8
  (All versions), Desigo CC family V9 (All versions), Desigo CC Flex Client V6
  (All vers…
severity: high
cvss: 8.2
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H'
cwe:
  - CWE-94
vendor: Siemens
product: Desigo CC ClickOnce Client V6
affected:
  - desigo_cc_clickonce_client_v6 < *
  - desigo_cc_clickonce_client_v7 < *
  - desigo_cc_family_v8
  - desigo_cc_family_v9
  - desigo_cc_flex_client_v6
  - desigo_cc_flex_client_v7
  - desigo_cc_installed_client_v6 < *
  - desigo_cc_installed_client_v7 < *
published: '2026-09-08'
updated: '2026-09-14'
sourceUpdated: '2026-09-14T14:17:07.503'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-34223'
references:
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-330084.html'
    label: productcert@siemens.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-14T13:46:27.584888Z'
epss: 0.00194
epssPercentile: 0.08061
ingestedAt: '2026-09-08T15:33:26.982Z'
---

## Overview

A vulnerability has been identified in Desigo CC ClickOnce Client V6 (All versions), Desigo CC ClickOnce Client V7 (All versions), Desigo CC family V8 (All versions), Desigo CC family V9 (All versions), Desigo CC Flex Client V6 (All versions), Desigo CC Flex Client V7 (All versions), Desigo CC Installed Client V6 (All versions), Desigo CC Installed Client V7 (All versions). The affected application is vulnerable to Client Code Execution (CCE) due to insufficient input validation when handling scripts embedded within user-defined graphics documents.  Specifically, when the script within a graphics document is designed or modified by an attacker to include malicious commands.  When a user opens a compromised graphics document, the embedded script is executed on the client application instance, allowing an attacker to write arbitrary files to the client's operating system. Successful exploitation requires an attacker to craft a malicious graphics document and entice a user with sufficient privileges to display it.  This could lead to compromise of the client operating system and potential lateral movement within the organization.

## Remediation

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