CVE-2014-2255: Siemens SIMATIC s7-1500 CPU Firmware

High severity, CVSS 7.8. EPSS: 4.5% chance of exploitation in the next 30 days.

Siemens SIMATIC S7-1500 CPU PLC devices with firmware before 1.5.0 allow remote attackers to cause a denial of service (defect-mode transition) via crafted HTTP packets.

Affected products

• Siemens SIMATIC s7-1500 CPU Firmware: up to and including 1.1.2; version 1.0.1 only; version 1.1.0 only; version 1.1.1 only

Published 2014-03-16. Last modified 2026-06-17.