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Industrial control advisorySeverity 4.3 medium
Siemens Desigo DXR and PXC Controllers
ICSA-26-225-08 · CISA · August 11, 2026
Summary
A vulnerability in Desigo DXR and PXC controllers has been identified that could allow an attacker to cause denial of service conditions by sending malformed BACnet packets. Recovery requires a device reset or reboot to restore normal functionality.
Siemens has released new versions for the affected products and recommends to update to the latest versions.
From CISA, quoted as published. Check the source before acting.
What to do
Update to V01.21.233.16-7862 or later version
Please contact your local Siemens office for additional support in obtaining the update.
Update to V02.21.194.36-2715 or later version
Please contact your local Siemens office for additional support in obtaining the update.
Vendor fix or mitigation, quoted from the advisory.
Each CVE in this advisory
| CVE | Severity | Known exploited | Exploit likelihood |
|---|---|---|---|
| CVE-2026-59693 | 4.3 medium | No | 0.2% |
Severity from the advisory (CVSS), known exploitation from CISA's catalog, exploit likelihood from EPSS (next 30 days).
Affected products
| Vendor | Product |
|---|---|
| Siemens | Desigo DXR2 |
| Siemens | Desigo PXC3 |
| Siemens | Desigo PXC4 |
| Siemens | Desigo PXC5.E003 |
| Siemens | Desigo PXC5.E24 |
| Siemens | Desigo PXC7 |
Why it's on these mode pages
- Maritime: Vendor table: Siemens (industrial control makers used in every mode, all modes) (matched by rule)
- Pipeline: Vendor table: Siemens (industrial control makers used in every mode, all modes) (matched by rule)
- Freight rail: Vendor table: Siemens (industrial control makers used in every mode, all modes) (matched by rule)
- Passenger rail and transit: Vendor table: Siemens (industrial control makers used in every mode, all modes) (matched by rule)
- Highway and motor carrier: Vendor table: Siemens (industrial control makers used in every mode, all modes) (matched by rule)
- Postal and parcel: Vendor table: Siemens (industrial control makers used in every mode, all modes) (matched by rule)
Change history
- August 11, 2026: Publication Date
- August 13, 2026: Initial CISA Republication of Siemens SSA-781903 advisory
- November 9, 2026: First collected by Watch
Securidigm Scout can match advisories like this one to the equipment on your own network, offline. securidigm.com