CVE-2019-13945: Siemens s7-200 Smart Firmware
Medium severity, CVSS 6.8. EPSS: 0.5% chance of exploitation in the next 30 days.
A vulnerability has been identified in SIMATIC S7-1200 CPU family (incl. SIPLUS variants) (All versions), SIMATIC S7-1200 CPU family < V4.x (incl. SIPLUS variants) (All versions), SIMATIC S7-1200 CPU family V4.x (incl. SIPLUS variants) (All versions with Function State (FS) < 11), SIMATIC S7-200 SMART CPU CR20s (6ES7 288-1CR20-0AA1) (All versions <= V2.3.0 and Function State (FS) <= 3), SIMATIC S7-200 SMART CPU CR30s (6ES7 288-1CR30-0AA1) (All versions <= V2.3.0 and Function State (FS) <= 3), SIMATIC S7-200 SMART CPU CR40 (6ES7 288-1CR40-0AA0) (All versions <= V2.2.2 and Function State (FS) <= 8), SIMATIC S7-200 SMART CPU CR40s (6ES7 288-1CR40-0AA1) (All versions <= V2.3.0 and Function State (FS) <= 3), SIMATIC S7-200 SMART CPU CR60 (6ES7 288-1CR60-0AA0) (All versions <= V2.2.2 and Function State (FS) <= 10), SIMATIC S7-200 SMART CPU CR60s (6ES7 288-1CR60-0AA1) (All versions <= V2.3.0 and Function State (FS) <= 3), SIMATIC S7-200 SMART CPU SR20 (6ES7 288-1SR20-0AA0) (All versions <= V2.5.0 and Function State (FS) <= 11), SIMATIC S7-200 SMART CPU SR30 (6ES7 288-1SR30-0AA0) (All versions <= V2.5.0 and Function State (FS) <= 10), SIMATIC S7-200 SMART CPU SR40 (6ES7 288-1SR40-0AA0) (All versions <= V2.5.0 and Function State (FS) <= 10), SIMATIC S7-200 SMART CPU SR60 (6ES7 288-1SR60-0AA0) (All versions <= V2.5.0 and Function State (FS) <= 12), SIMATIC S7-200 SMART CPU ST20 (6ES7 288-1ST20-0AA0) (All versions <= V2.5.0 and Function State (FS) <= 9), SIMATIC S7-200 SMART CPU ST30 (6ES7 288-1ST30-0AA0) (All versions <= V2.5.0 and Function State (FS) <= 9), SIMATIC S7-200 SMART CPU ST40 (6ES7 288-1ST40-0AA0) (All versions <= V2.5.0 and Function State (FS) <= 8), SIMATIC S7-200 SMART CPU ST60 (6ES7 288-1ST60-0AA0) (All versions <= V2.5.0 and Function State (FS) <= 8), SIMATIC S7-200 SMART CPU family (All versions). There is an access mode used during manufacturing of the affected devices that allows additional diagnostic functionality. The security vulnerability could be exploited by an attacker with physical access to the UART interface during boot process.
Affected products
- Siemens s7-200 Smart Firmware: any version
- Siemens SIMATIC s7-1200 Firmware: any version
- Siemens SIMATIC s7-200 Smart CPU CR20S Firmware: up to and including 2.3.0
- Siemens SIMATIC s7-200 Smart CPU CR30S Firmware: up to and including 2.3.0
- Siemens SIMATIC s7-200 Smart CPU CR40 Firmware: up to and including 2.2.2
- Siemens SIMATIC s7-200 Smart CPU CR40S Firmware: up to and including 2.3.0
- Siemens SIMATIC s7-200 Smart CPU CR60 Firmware: up to and including 2.2.2
- Siemens SIMATIC s7-200 Smart CPU CR60S Firmware: up to and including 2.3.0
- Siemens SIMATIC s7-200 Smart CPU SR20 Firmware: up to and including 2.5.0
- Siemens SIMATIC s7-200 Smart CPU SR30 Firmware: up to and including 2.5.0
- Siemens SIMATIC s7-200 Smart CPU SR40 Firmware: up to and including 2.5.0
- Siemens SIMATIC s7-200 Smart CPU SR60 Firmware: up to and including 2.5.0
- Siemens SIMATIC s7-200 Smart CPU ST20 Firmware: up to and including 2.5.0
- Siemens SIMATIC s7-200 Smart CPU ST30 Firmware: up to and including 2.5.0
- Siemens SIMATIC s7-200 Smart CPU ST40 Firmware: up to and including 2.5.0
- Siemens SIMATIC s7-200 Smart CPU ST60 Firmware: up to and including 2.5.0
Published 2019-12-12. Last modified 2026-06-17.