CVE-2020-15782: Siemens Et 200sp Open Controller Firmware

Critical severity, CVSS 9.8. EPSS: 5.2% chance of exploitation in the next 30 days.

A vulnerability has been identified in SIMATIC Drive Controller family (All versions < V2.9.2), SIMATIC ET 200SP Open Controller CPU 1515SP PC (incl. SIPLUS variants) (All versions), SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) (All versions < V21.9), SIMATIC S7-1200 CPU family (incl. SIPLUS variants) (All versions < V4.5.0), SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions < V2.9.2), SIMATIC S7-1500 Software Controller (All versions < V21.9), SIMATIC S7-PLCSIM Advanced (All versions < V4.0), SINAMICS PERFECT HARMONY GH180 Drives (Drives manufactured before 2021-08-13), SINUMERIK MC (All versions < V6.15), SINUMERIK ONE (All versions < V6.15). Affected devices are vulnerable to a memory protection bypass through a specific operation. A remote unauthenticated attacker with network access to port 102/tcp could potentially write arbitrary data and code to protected memory areas or read sensitive data to launch further attacks.

Affected products

• Siemens Et 200sp Open Controller Firmware: any version
• Siemens s7-1200 CPU Firmware: before 4.5.0 (fixed in 4.5.0)
• Siemens s7-1500 CPU Firmware: before 2.9.2 (fixed in 2.9.2)
• Siemens SIMATIC Driver Controller Firmware: before 2.9.2 (fixed in 2.9.2)
• Siemens SIMATIC s7-1500 Software Controller: any version
• Siemens SIMATIC s7-Plcsim Advanced: before 4.0 (fixed in 4.0)

Published 2021-05-28. Last modified 2026-06-17.