CVE record · CVE-2026-34223

Code injection in Siemens Desigo CC ClickOnce Client V6 and others

CVSS 8.6 HighEPSS 0.0019 · 9th percentile

Published by the CVE Program (CNA: siemens) at 8 Sept 2026, 08:11 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Siemens	Desigo CC ClickOnce Client V6	affected before * custom Other versions: unknown
Siemens	Desigo CC ClickOnce Client V7	affected before * custom Other versions: unknown
Siemens	Desigo CC family V8	unaffected before * custom Other versions: unknown
Siemens	Desigo CC family V9	unaffected before * custom Other versions: unknown
Siemens	Desigo CC Flex Client V6	unaffected before * custom Other versions: unknown
Siemens	Desigo CC Flex Client V7	unaffected before * custom Other versions: unknown
Siemens	Desigo CC Installed Client V6	affected before * custom Other versions: unknown
Siemens	Desigo CC Installed Client V7	affected before * custom Other versions: unknown

Identifiers: CVE-2026-34223
CNA: siemens
Weakness (CWE): CWE-94
Tags: Siemens Desigo CC ClickOnce Client V6
Siemens Desigo CC ClickOnce Client V7
Siemens Desigo CC family V8
Siemens Desigo CC family V9
Siemens Desigo CC Flex Client V6
Siemens Desigo CC Flex Client V7
Siemens Desigo CC Installed Client V6
Siemens Desigo CC Installed Client V7
Code injection
Published: 8 Sept 2026
Updated: 14 Sept 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
8.2	High	3.1	CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H	CNA (siemens)
8.6	High	4.0	CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H	CNA (siemens)Used for this record

CISA KEV Not listed.
EPSS 0.0019, the 9th percentile, on 12 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 8 Sept 2026. New records show when each source confirmed them.

Sources

References from the CNA

cert-portal.siemens.com/productcert/html/ssa-330084.html

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.