CVE-2025-40796: Siemens SIMATIC Pcs Neo

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

A vulnerability has been identified in SIMATIC PCS neo V4.1 (All versions), SIMATIC PCS neo V5.0 (All versions), SIMATIC PCS neo V6.0 (All versions < V6.0 SP1 Update 1), User Management Component (UMC) (All versions < V2.15.1.3). Affected products contain a out-of-bounds read vulnerability in the integrated UMC component. This could allow an unauthenticated remote attacker to cause a denial of service condition.

Affected products

• Siemens SIMATIC Pcs Neo: version 4.1 only; version 5.0 only
• Siemens User Management Component: before 2.15.1.3 (fixed in 2.15.1.3)

Published 2025-09-09. Last modified 2026-06-17.