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Fencer Vulns
medium 6.5

CVE-2023-37556 json

CODESYS Improper Input Validation in CmpAppBP

published 2023-08-03 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-41442

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 50%
public exploits
0
none known

Summary

In multiple versions of multiple Codesys products, after successful authentication as a user, specific crafted network communication requests with inconsistent content can cause the CmpAppBP component to read internally from an invalid address, potentially leading to a denial-of-service condition. This vulnerability is different to CVE-2023-37552, CVE-2023-37553, CVE-2023-37554 and CVE-2023-37555.

Patch / fix

  • CODESYS CODESYS Control for BeagleBone SL V4.10.0.0
  • CODESYS CODESYS Control for emPC-A/iMX6 SL V4.10.0.0
  • CODESYS CODESYS Control for IOT2000 SL V4.10.0.0
  • CODESYS CODESYS Control for Linux SL V4.10.0.0
  • CODESYS CODESYS Control for PFC100 SL V4.10.0.0
  • CODESYS CODESYS Control for PFC200 SL V4.10.0.0
  • CODESYS CODESYS Control for PLCnext SL V4.10.0.0
  • CODESYS CODESYS Control for Raspberry Pi SL V4.10.0.0
  • CODESYS CODESYS Control for WAGO Touch Panels 600 SL V4.10.0.0
  • CODESYS CODESYS Control RTE (for Beckhoff CX) SL V3.5.19.20
  • CODESYS CODESYS Control RTE (SL) V3.5.19.20
  • CODESYS CODESYS Control Runtime System Toolkit V3.5.19.20
  • CODESYS CODESYS Control Win (SL) V3.5.19.20
  • CODESYS CODESYS Development System V3 V3.5.19.20
  • CODESYS CODESYS HMI (SL) V3.5.19.20
  • CODESYS CODESYS Safety SIL2 Runtime Toolkit V3.5.19.20

Vendor advisories

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

cisa ICSA-26-076-01 updated cvss 6.5

CODESYS in Festo Automation Suite

  • CODESYS Development System 3.0 Festo Automation Suite 2.8.0.137, Festo Automation Suite < 2.8.0.138 CODESYS Development System 3.5.16.10 Festo Automation Suite 2.8.0.137, Festo Automation Suite < 2.8.0.138
    affected: mitigation
  • Festo Automation Suite 2.8.0.138 CODESYS Development System 3.5.21.20
    fixed

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

cisa ICSA-26-020-02 updated cvss 6.5

Schneider Electric devices using CODESYS Runtime

  • Schneider Electric Easy Harmony HMIET6/HMIFT6 Magelis HMIGXU series <2.0_HF2
    affected: vendor fix se.com
  • Schneider Electric Easy Modicon M310 <3.1.5.82
    affected: vendor fix, mitigation se.com
  • Schneider Electric Harmony (Formerly Magelis) HMIGK/HMIGTO/HMIGTU/HMIGTUX/HMISTU series <6.3_HF3
    affected: fixed in v6.3
  • Schneider Electric Harmony iPC series Vijeo Designer runtime <6.3_SP2 Schneider Electric Harmony P6 series Vijeo Designer runtime <6.3_SP2
    affected: fixed in v6.3 se.com
  • Schneider Electric HMISCU Controller <6.3.1
    affected: fixed in v6.3.1, mitigation se.com
  • Schneider Electric Magelis XBT series
    affected: no fix planned
  • Schneider Electric Modicon Controller LMC058
    affected: mitigation
  • Schneider Electric Modicon Controller M241 <5.2.11.18 Schneider Electric Modicon Controller M251 <5.2.11.18
    affected: fixed in v2.2, mitigation se.com
show 6 more
  • Schneider Electric Modicon Controller M258
    affected: mitigation
  • Schneider Electric Modicon Controller M262 <5.2.8.12
    affected: fixed in v2.2, mitigation se.com
  • Schneider Electric PacDrive 3 Controllers: LMC Eco/Pro/Pro2 <1.76.14.1
    affected: fixed in V2.2, mitigation se.com
  • Schneider Electric SoftSPS embedded in EcoStruxure Machine Expert <2.2
    affected: vendor fix, mitigation se.com
  • Schneider Electric Vijeo Designer embedded in EcoStruxure Machine Expert <6.3.1
    affected: fixed in v6.3.1 se.com
  • Schneider Electric Easy Modicon M310 3.1.5.82 Schneider Electric Harmony (Formerly Magelis) HMIGK/HMIGTO/HMIGTU/HMIGTUX/HMISTU series iPC series with Vijeo Designer runtime 6.3_HF3 Schneider Electric Harmony iPC series Vijeo Designer runtime 6.3_SP2 Schneider Electric Harmony P6 series Vijeo Designer runtime 6.3_SP2 Schneider Electric HMISCU Controller 6.3.1 Schneider Electric Modicon Controller M241 5.2.11.18
    +6 more products
    Schneider Electric Modicon Controller M251 5.2.11.18 Schneider Electric Modicon Controller M262 5.2.8.12 Schneider Electric PacDrive 3 Controllers: LMC Eco/Pro/Pro2 1.76.14.1 Schneider Electric SoftSPS embedded in EcoStruxure Machine Expert 2.2 Schneider Electric Vijeo Designer Basic 2.0_HotFix_2 Schneider Electric Vijeo Designer embedded in EcoStruxure Machine Expert 6.3.1
    fixed

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

cisa ICSA-25-112-04 updated cvss 6.5

ABB MV Drives

  • ABB ACS5000 >=LAAAB_4.03.0, <LAAAB_5.06.1 ABB ACS6000 >=LAAAA_2.10.0, <LAAAB_5.06.1 ABB ACS6080 >=LAAAA_2.10.0, <LAAAB_5.06.1
    affected: vendor fix
  • ABB ACS5000 LAAAB_5.07 ABB ACS6000 LAAAB_5.07 ABB ACS6080 LAAAB_5.07
    fixed

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

cisa ICSA-25-093-03 updated cvss 6.5

ABB ACS880 Drives Containing CODESYS RTS

  • ABB ACS880 IGBT Supply Control Program <AISLX_v3.43, <ALHLX_v3.43, <YISLX_v1.30, <YLHLX_v1.30
    affected: vendor fix
  • ABB ACS880 Position Control Program <=APCLX_v1.04.0.5
    affected: workaround
  • ABB ACS880 Primary Control Program <AINLX_v3.47, <YINLX_v1.30
    affected: vendor fix
  • ABB ACS880 Test Bench Control Program <=ATBLX_v3.44.0.0
    affected: workaround
  • ABB ACS880 IGBT Supply Control Program >=AISLX_v3.43, >=ALHLX_v3.43, >=YISLX_v1.30, >=YLHLX_v1.30 ABB ACS880 Primary Control Program >=AINLX_v3.47, >=YINLX_v1.30
    fixed

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

cisa ICSA-25-093-04 updated cvss 6.5

ABB Low Voltage DC Drives and Power Controllers CODESYS RTS

  • ABB Drive Application Builder license (IEC 61131-3) ABB DC drives & power controllers ABB Power Optimizer
    affected: workaround

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
partial
Assessed
2 y ago

Exploit prediction

0.63% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

  • CODESYS CODESYS Control for BeagleBone SL
  • CODESYS CODESYS Control for emPC-A/iMX6 SL
  • CODESYS CODESYS Control for IOT2000 SL
  • CODESYS CODESYS Control for Linux SL
  • CODESYS CODESYS Control for PFC100 SL
  • CODESYS CODESYS Control for PFC200 SL
  • CODESYS CODESYS Control for PLCnext SL
  • CODESYS CODESYS Control for Raspberry Pi SL
  • CODESYS CODESYS Control for WAGO Touch Panels 600 SL
  • CODESYS CODESYS Control RTE (for Beckhoff CX) SL
  • CODESYS CODESYS Control RTE (SL)
  • CODESYS CODESYS Control Runtime System Toolkit
  • CODESYS CODESYS Control Win (SL)
  • CODESYS CODESYS Development System V3
  • CODESYS CODESYS HMI (SL)
  • CODESYS CODESYS Safety SIL2 Runtime Toolkit

Classification

Weakness
  • CWE-20 Improper Input Validation

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.