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Fencer Vulns
critical 10.0

CVE-2022-34819 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 2022-07-12 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-37725

cvss
10.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
2.1%
EPSS 2.1% chance of exploitation in 30 days, percentile 81%
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 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.

Patch / fix

  • siemens simatic_cp_1543-1_firmware 3.0.22
  • siemens siplus_net_cp_1543-1_firmware 3.0.22

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 10.0

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
yes
Technical impact
total
Assessed
18 mo ago

Exploit prediction

2.08% chance of exploitation in the next 30 days, higher than 81% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 10.0 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C
CNA 3.1 10.0 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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

References

Sources

Fencer Vulns 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.