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Fencer Intel
critical 9.8

CVE-2022-34820 json

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 C…

published 4y ago modified 4mo ago also EUVD-2022-37726

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
2.2%
EPSS 2.2% chance of exploitation in 30 days, percentile 82%
public exploits
0
none known

Summary

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.

Patch / fix

  • 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_firmware 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
  • siemens siplus_net_cp_1543-1_firmware 3.0.22
  • siemens siplus_s7-1200_cp_1243-1_firmware 3.3.46
  • siemens siplus_s7-1200_cp_1243-1_rail_firmware 3.3.46

Is CVE-2022-34820 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-22-195-12 updated cvss 8.4

Siemens SRCS VPN Feature in SIMATIC CP Devices

  • Siemens SIMATIC CP 1242-7 V2 (6GK7242-7KX31-0XE0) <V3.3.46 Siemens SIMATIC CP 1243-1 (6GK7243-1BX30-0XE0) <V3.3.46 Siemens SIMATIC CP 1243-7 LTE EU (6GK7243-7KX30-0XE0) <V3.3.46 Siemens SIMATIC CP 1243-7 LTE US (6GK7243-7SX30-0XE0) <V3.3.46 Siemens SIMATIC CP 1243-8 IRC (6GK7243-8RX30-0XE0) <V3.3.46
    affected: fixed in V3.3.46, workaround, mitigation support.industry.siemens.com
  • Siemens SIMATIC CP 1542SP-1 IRC (6GK7542-6VX00-0XE0) >=V2.0_<V2.2.28
    affected: fixed in V2.2.28, workaround, mitigation support.industry.siemens.com
  • Siemens SIMATIC CP 1543-1 (6GK7543-1AX00-0XE0) <V3.0.22
    affected: fixed in V3.0.22, workaround, mitigation support.industry.siemens.com
  • Siemens SIMATIC CP 1543SP-1 (6GK7543-6WX00-0XE0) >=V2.0_<V2.2.28 Siemens SIPLUS ET 200SP CP 1542SP-1 IRC TX RAIL (6AG2542-6VX00-4XE0) >=V2.0_<V2.2.28 Siemens SIPLUS ET 200SP CP 1543SP-1 ISEC (6AG1543-6WX00-7XE0) >=V2.0_<V2.2.28 Siemens SIPLUS ET 200SP CP 1543SP-1 ISEC TX RAIL (6AG2543-6WX00-4XE0) >=V2.0_<V2.2.28
    affected: fixed in V2.2.28, workaround, mitigation support.industry.siemens.com
  • Siemens SIPLUS NET CP 1242-7 V2 (6AG1242-7KX31-7XE0) <V3.3.46
    affected: fixed in V3.3.46, workaround, mitigation support.industry.siemens.com
  • Siemens SIPLUS NET CP 1543-1 (6AG1543-1AX00-2XE0) <V3.0.22
    affected: fixed in V3.0.22, workaround, mitigation support.industry.siemens.com
  • Siemens SIPLUS S7-1200 CP 1243-1 (6AG1243-1BX30-2AX0) <V3.3.46 Siemens SIPLUS S7-1200 CP 1243-1 RAIL (6AG2243-1BX30-1XE0) <V3.3.46
    affected: fixed in V3.3.46, workaround, mitigation support.industry.siemens.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
last yr.

Exploit prediction

2.22% chance of exploitation in the next 30 days, higher than 82% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 8.4 CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C
CNA 3.1 8.4 CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 9.3 AV:N/AC:M/Au:N/C:C/I:C/A:C

Affected products

  • Siemens SIMATIC CP 1242-7 V2
  • Siemens SIMATIC CP 1243-1
  • Siemens SIMATIC CP 1243-7 LTE EU
  • Siemens SIMATIC CP 1243-7 LTE US
  • Siemens SIMATIC CP 1243-8 IRC
  • Siemens SIMATIC CP 1542SP-1 IRC
  • Siemens SIMATIC CP 1543-1
  • Siemens SIMATIC CP 1543SP-1
  • Siemens SIPLUS ET 200SP CP 1542SP-1 IRC TX RAIL
  • Siemens SIPLUS ET 200SP CP 1543SP-1 ISEC
  • Siemens SIPLUS ET 200SP CP 1543SP-1 ISEC TX RAIL
  • Siemens SIPLUS NET CP 1242-7 V2
  • Siemens SIPLUS NET CP 1543-1
  • Siemens SIPLUS S7-1200 CP 1243-1
  • Siemens SIPLUS S7-1200 CP 1243-1 RAIL

Classification

Weakness
  • CWE-77 Improper Neutralization of Special Elements used in a Command
  • CWE-116 Improper Encoding or Escaping of Output

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.