CVE-2013-2780: Siemens SIMATIC s7-1200 CPU 1211c Firmware

High severity, CVSS 7.8. EPSS: 2.4% chance of exploitation in the next 30 days.

Siemens SIMATIC S7-1200 PLCs 2.x and 3.x allow remote attackers to cause a denial of service (defect-mode transition and control outage) via crafted packets to UDP port 161 (aka the SNMP port).

Affected products

• Siemens SIMATIC s7-1200 CPU 1211c Firmware: before 4.0 (fixed in 4.0)
• Siemens SIMATIC s7-1200 CPU 1212c Firmware: before 4.0 (fixed in 4.0)
• Siemens SIMATIC s7-1200 CPU 1212fc Firmware: before 4.0 (fixed in 4.0)
• Siemens SIMATIC s7-1200 CPU 1214 Fc Firmware: before 4.0 (fixed in 4.0)
• Siemens SIMATIC s7-1200 CPU 1214c Firmware: before 4.0 (fixed in 4.0)
• Siemens SIMATIC s7-1200 CPU 1215 Fc Firmware: before 4.0 (fixed in 4.0)
• Siemens SIMATIC s7-1200 CPU 1215c Firmware: before 4.0 (fixed in 4.0)
• Siemens SIMATIC s7-1200 CPU 1217c Firmware: before 4.0 (fixed in 4.0)
• Siemens SIMATIC s7-1200 Firmware: before 4.0 (fixed in 4.0)

Published 2013-04-22. Last modified 2026-06-16.