CVE-2026-34223
highpriority · track · 33EPSS 0.002 · 9 %ileDENLUSEPSS · scored 2026-10-27
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.
remediations
Vendor fix, mitigation, or workaround guidance, as published by each source.
No vendor fix yet; a mitigation is available.
- MitigationDesigo CC ClickOnce Client V6siemens_psirt
Evaluate authorization policy for Graphics application following Least Privilege principle, so only required users have access to the configuration.
- MitigationDesigo CC ClickOnce Client V7siemens_psirt
Evaluate authorization policy for Graphics application following Least Privilege principle, so only required users have access to the configuration.
- MitigationDesigo CC Installed Client V6siemens_psirt
Evaluate authorization policy for Graphics application following Least Privilege principle, so only required users have access to the configuration.
- MitigationDesigo CC Installed Client V7siemens_psirt
Evaluate authorization policy for Graphics application following Least Privilege principle, so only required users have access to the configuration.
- MitigationDesigo CC family V6cisa_csaf_ot
Evaluate authorization policy for Graphics application following Least Privilege principle, so only required users have access to the configuration.
- MitigationDesigo CC family V7cisa_csaf_ot
Evaluate authorization policy for Graphics application following Least Privilege principle, so only required users have access to the configuration.
- No fix availableDesigo CC ClickOnce Client V6siemens_psirt
Currently no fix is available
- No fix availableDesigo CC ClickOnce Client V7siemens_psirt
Currently no fix is available
- No fix availableDesigo CC Installed Client V6siemens_psirt
Currently no fix is available
- No fix availableDesigo CC Installed Client V7siemens_psirt
Currently no fix is available
- No fix availableDesigo CC family V6cisa_csaf_ot
Currently no fix is available
- No fix availableDesigo CC family V7cisa_csaf_ot
Currently no fix is available
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.6–8.6
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (58)
Products and version ranges known to be affected.
advisories (3)
Vendor and ecosystem advisories describing this.
- NCSC-2026-0346Kwetsbaarheden verholpen in Siemens productenNL2026-09-08csaf · ncsc_nlNL
Siemens heeft kwetsbaarheden verholpen in diverse producten als Desigo, Reyrolle, SIMATIC, SCALANCE, SINAMICS en Siveillance.
- SSA-330084SSA-330084: Client Code Execution Vulnerability in Desigo CC Product Family2026-09-08csaf · siemens_psirtDE
A Client Code Execution (CCE) vulnerability has been identified in Desigo CC, potentially allowing malicious actors to execute arbitrary code on client devices through specially crafted graphics documents. This vulnerability leverages user-defined graphics containing embedded scripts that are executed on client application instances. Successful exploitation could lead to compromise of the client operating system and potential lateral movement within the organization.
- ICSA-26-265-05Siemens Desigo CC family2026-09-08icsa · cisa_csaf_otUS
A Client Code Execution (CCE) vulnerability has been identified in Desigo CC, potentially allowing malicious actors to execute arbitrary code on client devices through specially crafted graphics documents. This vulnerability leverages user-defined graphics containing embedded scripts that are executed on client application instances. Successful exploitation could lead to compromise of the client operating system and potential lateral movement within the organization.
sources
Which sources assert this record, and when.
references (1) nvd
External citations — patches, advisories, analysis.
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