CVE-2025-24008: Siemens Sirius 3rk3 Modular Safety System Mss

Medium severity, CVSS 6.5. EPSS: 0.3% chance of exploitation in the next 30 days.

A vulnerability has been identified in SIRIUS 3RK3 Modular Safety System (MSS) (All versions), SIRIUS Safety Relays 3SK2 (All versions). The affected devices do not encrypt data in transit. An attacker with network access could eavesdrop the connection and retrieve sensitive information, including obfuscated safety passwords.

Affected products

• Siemens Sirius 3rk3 Modular Safety System Mss: any version
• Siemens Sirius Safety Relays 3sk2: any version

Published 2025-05-13. Last modified 2026-06-17.