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CVE-2023-37555· NVD / CVE Program· CNA CERTVDE

CODESYS Improper Input Validation in CmpAppBP

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-2023-37556.

MediumCVSS 6.5 · v3.1—No exploit Fix available
Published
Aug 3, 2023
Updated
Jun 17, 2026
EPSS
0.6% · 48th percentile
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Action score

26

Monitor

Low priority for now.

CVSS
26 / 40 · 6.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.6%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · CERTVDE
6.5
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Affected systems

VendorProduct
codesyscontrol for beaglebone sl
codesyscontrol for empc-a\/imx6 sl
codesyscontrol for iot2000 sl
codesyscontrol for linux sl
codesyscontrol for pfc100 sl
codesyscontrol for pfc200 sl
codesyscontrol for plcnext sl
codesyscontrol for raspberry pi sl
codesyscontrol for wago touch panels 600 sl
codesyscontrol rte sl
codesyscontrol rte sl \(for beckhoff cx\)
codesyscontrol runtime system toolkit

and 4 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • codesys control for beaglebone slbefore 4.10.0.0
  • codesys control for empc-a/imx6 slbefore 4.10.0.0
  • codesys control for iot2000 slbefore 4.10.0.0
  • codesys control for linux slbefore 4.10.0.0
  • codesys control for pfc100 slbefore 4.10.0.0
  • codesys control for pfc200 slbefore 4.10.0.0
  • codesys control for plcnext slbefore 4.10.0.0
  • codesys control for raspberry pi slbefore 4.10.0.0
  • codesys control for wago touch panels 600 slbefore 4.10.0.0
  • codesys control rte slbefore 3.5.19.20
  • codesys control rte sl (for beckhoff cx)before 3.5.19.20
  • codesys control runtime system toolkitbefore 3.5.19.20
  • codesys control win slbefore 3.5.19.20
  • codesys development systembefore 3.5.19.20
  • codesys hmibefore 3.5.19.20
  • codesys safety sil2before 3.5.19.20

Versions reported by the vendor

Affected version ranges reported by the assigning authority (CERTVDE). Independent of NVD's CPE analysis and usually ahead of it.

  • CODESYS CODESYS Control for BeagleBone SL

    • before V4.10.0.0affected · semver

  • CODESYS CODESYS Control for emPC-A/iMX6 SL

    • before V4.10.0.0affected · semver

  • CODESYS CODESYS Control for IOT2000 SL

    • before V4.10.0.0affected · semver

  • CODESYS CODESYS Control for Linux SL

    • before V4.10.0.0affected · semver

  • CODESYS CODESYS Control for PFC100 SL

    • before V4.10.0.0affected · semver

  • CODESYS CODESYS Control for PFC200 SL

    • before V4.10.0.0affected · semver

  • CODESYS CODESYS Control for PLCnext SL

    • before V4.10.0.0affected · semver

  • CODESYS CODESYS Control for Raspberry Pi SL

    • before V4.10.0.0affected · semver

  • CODESYS CODESYS Control for WAGO Touch Panels 600 SL

    • before V4.10.0.0affected · semver

  • CODESYS CODESYS Control RTE (for Beckhoff CX) SL

    • before V3.5.19.20affected · semver

  • CODESYS CODESYS Control RTE (SL)

    • before V3.5.19.20affected · semver

  • CODESYS CODESYS Control Runtime System Toolkit

    • before V3.5.19.20affected · semver

Same product

codesys: all records

Other highest-scoring records for the same primary product.

  • CVE-2019-9010An issue was discovered in 3S-Smart CODESYS V3 products.
    40Plan
  • CVE-2018-10612In 3S-Smart Software Solutions GmbH CODESYS Control V3 products prior to version 3.5.14.0, user access management and communication encrypti
    39Monitor
  • CVE-2022-47379CODESYS: Multiple products prone to out-of-bounds write
    36Monitor
  • CVE-2023-6357OS Command Injection in multiple CODESYS products
    35Monitor
  • CVE-2022-4046CODESYS: Improper memory restrictions fro CODESYS Control
    35Monitor
  • CVE-2022-47390CODESYS: Multiple products prone to stack based out-of-bounds write
    35Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
CODESYS CODESYS Control for BeagleBone SLV4.10.0.0Vendor (CNA)
CODESYS CODESYS Control for emPC-A/iMX6 SLV4.10.0.0Vendor (CNA)
CODESYS CODESYS Control for IOT2000 SLV4.10.0.0Vendor (CNA)
CODESYS CODESYS Control for Linux SLV4.10.0.0Vendor (CNA)
CODESYS CODESYS Control for PFC100 SLV4.10.0.0Vendor (CNA)
CODESYS CODESYS Control for PFC200 SLV4.10.0.0Vendor (CNA)
CODESYS CODESYS Control for PLCnext SLV4.10.0.0Vendor (CNA)
CODESYS CODESYS Control for Raspberry Pi SLV4.10.0.0Vendor (CNA)
CODESYS CODESYS Control for WAGO Touch Panels 600 SLV4.10.0.0Vendor (CNA)
CODESYS CODESYS Control RTE (for Beckhoff CX) SLV3.5.19.20Vendor (CNA)
CODESYS CODESYS Control RTE (SL)V3.5.19.20Vendor (CNA)
CODESYS CODESYS Control Runtime System ToolkitV3.5.19.20Vendor (CNA)
CODESYS CODESYS Control Win (SL)V3.5.19.20Vendor (CNA)
CODESYS CODESYS Development System V3V3.5.19.20Vendor (CNA)
CODESYS CODESYS HMI (SL)V3.5.19.20Vendor (CNA)
CODESYS CODESYS Safety SIL2 Runtime ToolkitV3.5.19.20Vendor (CNA)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-20 · Improper Input Validation

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

We use this product, ask for help

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records