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Thu, September 11, 2025

Siemens SIVaaS Network Share: Authentication Flaw (Critical)

⚠️A critical vulnerability (CVE-2025-40804) affects Siemens SIMATIC Virtualization as a Service (SIVaaS), exposing a network share without authentication and allowing remote actors to access or modify sensitive data. Calculated scores are CVSS v4 9.3 and CVSS v3.1 9.1 with low attack complexity. Siemens advises contacting Technical Support; CISA recommends isolating control systems, minimizing internet exposure, and using layered defenses.

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