CVE-2014-2256: Siemens SIMATIC s7 CPU-1211c

High severity, CVSS 7.8. EPSS: 3.7% chance of exploitation in the next 30 days.

Siemens SIMATIC S7-1200 CPU PLC devices with firmware before 4.0 allow remote attackers to cause a denial of service (defect-mode transition) via crafted ISO-TSAP packets, a different vulnerability than CVE-2014-2257.

Affected products

• Siemens SIMATIC s7 CPU-1211c
• Siemens SIMATIC s7 CPU 1200 Firmware: up to and including 3.0.2; version 3.0 only
• Siemens SIMATIC s7 CPU 1212c
• Siemens SIMATIC s7 CPU 1214c
• Siemens SIMATIC s7 CPU 1215c
• Siemens SIMATIC s7 CPU 1217c

Published 2014-03-24. Last modified 2026-06-17.