# Siemens Desigo CC, IoT2050 patch flaws

Published: 2026-11-05 · Severity: severe · Sectors: Manufacturing, Infrastructure
Canonical: https://vorant.io/reports/32e52848-6885-505b-97f6-a81b21a8c9c9/siemens-desigo-cc-iot2050-patch-flaws
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> CERT-FR advisory covers multiple vulnerabilities in Siemens Desigo CC and SIMATIC IoT2050 enabling remote code execution, DoS, and data exposure.

Source: cert.cyber.gouv.fr — https://www.cert.cyber.gouv.fr/avis/CERTFR-2026-AVI-1464

## What to check

- Applies to: The 2 CVEs named below. Whether you run an affected version is not assessed: check the versions the source lists.
- Exploitation: CISA lists CVE-2026-111497 as exploited in the wild.

CERT-FR issued an advisory relaying two Siemens security bulletins (SSA-045512 and SSA-834709) dated November 4, 2026, describing multiple vulnerabilities affecting Siemens Desigo CC building automation software (versions V8 and V9 lacking the latest .NET patch) and SIMATIC IoT2050 devices running firmware prior to version 4.3.4-1. The vulnerabilities, tracked as CVE-2026-111497 and CVE-2026-58115, can allow an attacker to achieve remote arbitrary code execution, trigger remote denial of service, breach data confidentiality, compromise data integrity, or bypass security policies.

No in-the-wild exploitation is reported in the advisory. Affected organizations using Desigo CC building management systems or SIMATIC IoT2050 industrial IoT gateways should apply the vendor-supplied patches referenced in the Siemens security bulletins as soon as feasible, prioritizing the .NET update for Desigo CC and the firmware upgrade to 4.3.4-1 or later for IoT2050 devices.

## Mentioned in this report

- Vulnerabilities: CVE-2026-111497 (KEV), CVE-2026-58115

Source reporting: https://www.cert.cyber.gouv.fr/avis/CERTFR-2026-AVI-1464

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