Missing Authentication in Siemens SIMATIC ET 200SP Modules
⚠️ Siemens ProductCERT and CISA report a Missing Authentication for Critical Function vulnerability (CVE-2025-40771) affecting SIMATIC ET 200SP CP modules. The flaw allows an unauthenticated remote actor to access device configuration data and is rated highly severe (CVSS v4 9.3; CVSS v3.1 9.8). Siemens advises updating affected modules to V2.4.24 or later and restricting access to trusted IP addresses; CISA recommends minimizing network exposure, isolating control networks, and using secure remote access methods.
