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CVE

CVE-2023-37553

In multiple versions of multiple Codesys products, after successful authentication as a user, specific crafted network c

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-2023-37554, CVE-2023-37555 and CVE-2023-37556.

MEDIUM · CVSS 6.5 EPSS 0.00199
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  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-20Improper Input Validation
▤

Affected Products & Versions

16
codesys control for beaglebone sl< 4.10.0.0
codesys control for empc-a\/imx6 sl< 4.10.0.0
codesys control for iot2000 sl< 4.10.0.0
codesys control for linux sl< 4.10.0.0
codesys control for pfc100 sl< 4.10.0.0
codesys control for pfc200 sl< 4.10.0.0
codesys control for plcnext sl< 4.10.0.0
codesys control for raspberry pi sl< 4.10.0.0
▣

Scoring & Timeline

6.5
MEDIUM · CVSS v3.1 · info@cert.vde.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD03 Aug 2023 · 12:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

5
cisa-csafcisa-csaf-csaf_files-OT-white-2025-icsa-25-093-03
cisa-csafcisa-csaf-csaf_files-OT-white-2025-icsa-25-093-04
cisa-csafcisa-csaf-csaf_files-OT-white-2025-icsa-25-112-04
cisa-csafcisa-csaf-csaf_files-OT-white-2026-icsa-26-020-02
cisa-csafcisa-csaf-csaf_files-OT-white-2026-icsa-26-076-01
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://cert.vde.com/en/advisories/VDE-2023-019/Third Party Advisory
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