Advisories · Technology

Siemens SIMATIC ET 200clean, CM 8x IO-Link.

Every CVE that names Siemens SIMATIC ET 200clean, CM 8x IO-Link among its affected products, newest first. Vendors and products are as the CNA wrote them; check the affected versions on each record.

CVE-2025-40820 CVE record

CVSS 8.7 High

Affected products do not properly enforce TCP sequence number validation in specific scenarios but accept values within a broad range.
- Siemens SIDOOR ATD430W
- Siemens SIDOOR ATE530G COATED
- CWE-940
Not analysed yet 9 Dec 2025