CVE-2022-43767: Siemens SIMATIC CP 1242-7 v2 Firmware

High severity, CVSS 7.5. EPSS: 0.7% chance of exploitation in the next 30 days.

A vulnerability has been identified in SIMATIC CP 1242-7 V2 (6GK7242-7KX31-0XE0) (All versions < V3.4.29), SIMATIC CP 1243-1 (6GK7243-1BX30-0XE0) (All versions < V3.4.29), SIMATIC CP 1243-1 DNP3 (incl. SIPLUS variants) (All versions < V3.4.29), SIMATIC CP 1243-1 IEC (incl. SIPLUS variants) (All versions < V3.4.29), SIMATIC CP 1243-7 LTE EU (6GK7243-7KX30-0XE0) (All versions < V3.4.29), SIMATIC CP 1243-7 LTE US (6GK7243-7SX30-0XE0) (All versions < V3.4.29), SIMATIC CP 1243-8 IRC (6GK7243-8RX30-0XE0) (All versions < V3.4.29), SIMATIC CP 1542SP-1 (6GK7542-6UX00-0XE0) (All versions < V2.3), SIMATIC CP 1542SP-1 IRC (6GK7542-6VX00-0XE0) (All versions < V2.3), SIMATIC CP 1543SP-1 (6GK7543-6WX00-0XE0) (All versions < V2.3), SIMATIC CP 443-1 (6GK7443-1EX30-0XE0) (All versions < V3.3), SIMATIC CP 443-1 (6GK7443-1EX30-0XE1) (All versions < V3.3), SIMATIC CP 443-1 Advanced (6GK7443-1GX30-0XE0) (All versions < V3.3), SIPLUS ET 200SP CP 1542SP-1 IRC TX RAIL (6AG2542-6VX00-4XE0) (All versions < V2.3), SIPLUS ET 200SP CP 1543SP-1 ISEC (6AG1543-6WX00-7XE0) (All versions < V2.3), SIPLUS ET 200SP CP 1543SP-1 ISEC TX RAIL (6AG2543-6WX00-4XE0) (All versions < V2.3), SIPLUS NET CP 1242-7 V2 (6AG1242-7KX31-7XE0) (All versions < V3.4.29), SIPLUS NET CP 443-1 (6AG1443-1EX30-4XE0) (All versions < V3.3), SIPLUS NET CP 443-1 Advanced (6AG1443-1GX30-4XE0) (All versions < V3.3), SIPLUS S7-1200 CP 1243-1 (6AG1243-1BX30-2AX0) (All versions < V3.4.29), SIPLUS S7-1200 CP 1243-1 RAIL (6AG2243-1BX30-1XE0) (All versions < V3.4.29), SIPLUS TIM 1531 IRC (6AG1543-1MX00-7XE0) (All versions < V2.3.6), TIM 1531 IRC (6GK7543-1MX00-0XE0) (All versions < V2.3.6). The webserver of the affected products contains a vulnerability that may lead to a denial of service condition. An attacker may cause a denial of service situation of the webserver of the affected product.

Affected products

• Siemens SIMATIC CP 1242-7 v2 Firmware: any version
• Siemens SIMATIC CP 1243-1 DNP3 Firmware: any version
• Siemens SIMATIC CP 1243-1 Firmware: any version
• Siemens SIMATIC CP 1243-1 Iec 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 Firmware: any version
• Siemens SIMATIC CP 1542sp-1 Irc Firmware: any version
• Siemens SIMATIC CP 1543sp-1 Firmware: any version
• Siemens SIMATIC CP 443-1 Advanced Firmware: before 3.3 (fixed in 3.3)
• Siemens SIMATIC CP 443-1 Firmware: before 3.3 (fixed in 3.3)
• Siemens SIMATIC Ipc Diagbase Firmware: any version
• Siemens SIMATIC Ipc Diagmonitor Firmware: any version
• Siemens Siplus Et 200sp CP 1542sp-1 Irc Tx Rail Firmware: any version
• Siemens Siplus Et 200sp CP 1543sp-1 Isec Firmware: any version
• Siemens Siplus Et 200sp CP 1543sp-1 Isec Tx Rail Firmware: any version
• Siemens Siplus Net CP 1242-7 v2 Firmware: any version
• Siemens Siplus Net CP 443-1 Advanced Firmware: before 3.3 (fixed in 3.3)
• Siemens Siplus Net CP 443-1 Firmware: before 3.3 (fixed in 3.3)
• Siemens Siplus s7-1200 CP 1243-1 Firmware: any version
• Siemens Siplus s7-1200 CP 1243-1 Rail Firmware: any version
• Siemens Siplus Tim 1531 Irc Firmware: before 2.3.6 (fixed in 2.3.6)
• Siemens Tim 1531 Irc Firmware: before 2.3.6 (fixed in 2.3.6)

Published 2023-04-11. Last modified 2026-06-17.