SIMATIC ET 200clean, CM 8x IO-Link vulnerabilities

1 known vulnerability in SIMATIC ET 200clean, CM 8x IO-Link from Siemens. 1 is rated high or critical. Each entry lists the affected versions and the release that fixes it, where the vendor has published one.

Latest first

• 7.5 High severity

  SIDOOR ATD430W: Improper Verification of Source of a Communication Channel

  CVE-2025-40820Dec 9, 2025Siemens

  Affected products do not properly enforce TCP sequence number validation in specific scenarios but accept values within a broad range. This could allow an unauthenticated remote attacker e.g. to interfere with connection setup, potentially leading to a denial