What’s Vulnerable › Vulnerabilities

CVE-2022-34819

• Severity: critical (CVSS 9.3 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-07-12 · updated 2026-06-17
• Weakness: CWE-122

Description

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: all versions
• Siemens Simatic Cp 1243-1 Firmware: all versions
• Siemens Simatic Cp 1243-7 Lte Eu Firmware: all versions
• Siemens Simatic Cp 1243-7 Lte Us Firmware: all versions
• Siemens Simatic Cp 1243-8 Irc Firmware: all versions
• Siemens Simatic Cp 1542Sp-1 Irc Firmware: from 2.0
• Siemens SIMATIC CP 1543-1 V4.0: 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: all versions
• Siemens Siplus Net Cp 1543-1 Firmware: before 3.0.22 — fixed in 3.0.22
• Siemens Siplus S7-1200 Cp 1243-1 Firmware: all versions
• Siemens Siplus S7-1200 Cp 1243-1 Rail Firmware: all versions

How to fix

Upgrade to a fixed version: Siemens SIMATIC CP 1543-1 V4.0 3.0.22; Siemens Siplus Net Cp 1543-1 Firmware 3.0.22. Check the vendor advisory for mitigations.

References

• https://cert-portal.siemens.com/productcert/pdf/ssa-517377.pdf
• https://cert-portal.siemens.com/productcert/pdf/ssa-517377.pdf

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