CVE-2022-34820

Severity: critical (CVSS 9.3 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.2% 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-77

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 does not correctly escape some user provided fields during the authentication process. This could allow an attacker to inject custom commands and execute arbitrary code with elevated privileges.

Affected products

Siemens Simatic Cp 1242-7 V2 Firmware: before 3.3.46 — fixed in 3.3.46
Siemens Simatic Cp 1243-1 Firmware: before 3.3.46 — fixed in 3.3.46
Siemens Simatic Cp 1243-7 Lte Eu Firmware: before 3.3.46 — fixed in 3.3.46
Siemens Simatic Cp 1243-7 Lte Us Firmware: before 3.3.46 — fixed in 3.3.46
Siemens Simatic Cp 1243-8 Irc Firmware: before 3.3.46 — fixed in 3.3.46
Siemens Simatic Cp 1542Sp-1 Irc Firmware: from 2.0 before 2.2.28 — fixed in 2.2.28
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 before 2.2.28 — fixed in 2.2.28
Siemens Siplus Et 200Sp Cp 1542Sp-1 Irc Tx Rail Firmware: from 2.0 before 2.2.28 — fixed in 2.2.28
Siemens Siplus Et 200Sp Cp 1543Sp-1 Isec Firmware: from 2.0 before 2.2.28 — fixed in 2.2.28
Siemens Siplus Et 200Sp Cp 1543Sp-1 Isec Tx Rail Firmware: from 2.0 before 2.2.28 — fixed in 2.2.28
Siemens Siplus Net Cp 1242-7 V2 Firmware: before 3.3.46 — fixed in 3.3.46
Siemens Siplus Net Cp 1543-1 Firmware: before 3.0.22 — fixed in 3.0.22
Siemens Siplus S7-1200 Cp 1243-1 Firmware: before 3.3.46 — fixed in 3.3.46
Siemens Siplus S7-1200 Cp 1243-1 Rail Firmware: before 3.3.46 — fixed in 3.3.46

How to fix

Upgrade to a fixed version: Siemens Simatic Cp 1242-7 V2 Firmware 3.3.46; Siemens Simatic Cp 1243-1 Firmware 3.3.46; Siemens Simatic Cp 1243-7 Lte Eu Firmware 3.3.46; Siemens Simatic Cp 1243-7 Lte Us Firmware 3.3.46; Siemens Simatic Cp 1243-8 Irc Firmware 3.3.46; Siemens Simatic Cp 1542Sp-1 Irc Firmware 2.2.28; Siemens SIMATIC CP 1543-1 V4.0 3.0.22; Siemens Simatic Cp 1543Sp-1 Firmware 2.2.28; Siemens Siplus Et 200Sp Cp 1542Sp-1 Irc Tx Rail Firmware 2.2.28; Siemens Siplus Et 200Sp Cp 1543Sp-1 Isec Firmware 2.2.28; Siemens Siplus Et 200Sp Cp 1543Sp-1 Isec Tx Rail Firmware 2.2.28; Siemens Siplus Net Cp 1242-7 V2 Firmware 3.3.46. Check the vendor advisory for mitigations.

References

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