CVE-2022-34819: Siemens SIMATIC CP 1242-7 v2 Firmware

Critical severity, CVSS 10.0. EPSS: 2.1% chance of exploitation in the next 30 days.

A vulnerability has been identified in SIMATIC CP 1242-7 V2 (All versions < V3.3.46), SIMATIC CP 1243-1 (All versions < V3.3.46), SIMATIC CP 1243-7 LTE EU (All versions < V3.3.46), SIMATIC CP 1243-7 LTE US (All versions < V3.3.46), SIMATIC CP 1243-8 IRC (All versions < V3.3.46), SIMATIC CP 1542SP-1 IRC (All versions >= V2.0 < V2.2.28), SIMATIC CP 1543-1 (All versions < V3.0.22), SIMATIC CP 1543SP-1 (All versions >= V2.0 < V2.2.28), SIPLUS ET 200SP CP 1542SP-1 IRC TX RAIL (All versions >= V2.0 < V2.2.28), SIPLUS ET 200SP CP 1543SP-1 ISEC (All versions >= V2.0 < V2.2.28), SIPLUS ET 200SP CP 1543SP-1 ISEC TX RAIL (All versions >= V2.0 < V2.2.28), SIPLUS NET CP 1242-7 V2 (All versions < V3.3.46), SIPLUS NET CP 1543-1 (All versions < V3.0.22), SIPLUS S7-1200 CP 1243-1 (All versions < V3.3.46), SIPLUS S7-1200 CP 1243-1 RAIL (All versions < V3.3.46). The application lacks proper validation of user-supplied data when parsing specific messages. This could result in a heap-based buffer overflow. An attacker could leverage this vulnerability to execute code in the context of device.

Affected products

  • Siemens SIMATIC CP 1242-7 v2 Firmware: any version
  • Siemens SIMATIC CP 1243-1 Firmware: any version
  • Siemens SIMATIC CP 1243-7 Lte Eu Firmware: any version
  • Siemens SIMATIC CP 1243-7 Lte Us Firmware: any version
  • Siemens SIMATIC CP 1243-8 Irc Firmware: any version
  • Siemens SIMATIC CP 1542sp-1 Irc Firmware: from 2.0
  • Siemens SIMATIC CP 1543-1 Firmware: before 3.0.22 (fixed in 3.0.22)
  • Siemens SIMATIC CP 1543sp-1 Firmware: from 2.0
  • Siemens Siplus Et 200sp CP 1542sp-1 Irc Tx Rail Firmware: from 2.0
  • Siemens Siplus Et 200sp CP 1543sp-1 Isec Firmware: from 2.0
  • Siemens Siplus Et 200sp CP 1543sp-1 Isec Tx Rail Firmware: from 2.0
  • Siemens Siplus Net CP 1242-7 v2 Firmware: any version
  • Siemens Siplus Net CP 1543-1 Firmware: before 3.0.22 (fixed in 3.0.22)
  • Siemens Siplus s7-1200 CP 1243-1 Firmware: any version
  • Siemens Siplus s7-1200 CP 1243-1 Rail Firmware: any version

Published 2022-07-12. Last modified 2026-06-17.