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CVE-2024-31486 Siemens CVE debrief

CVE-2024-31486 is a medium-severity vulnerability affecting Siemens SICAM products, specifically the OPUPI0 AMQP/MQTT module used within the CPC80 Central Processing/Communication system. The vulnerability stems from insufficient protection of MQTT client passwords stored on affected devices. An attacker with either remote shell access or physical access to the device could retrieve these credentials, resulting in confidentiality loss. The vulnerability was published on May 14, 2024, and modified on June 11, 2024, with the latter update adding acknowledgments for Constantin Schieber-Knöbl and Stefan Viehböck. Siemens has released firmware version OPUPI0 V5.30 as a remediation, available within the CP-8031/CP-8050 Package V5.30. The CVSS 3.1 vector (AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N) reflects that while network attack vector is possible, high attack complexity and low privileges required limit exploitability, with high impact to confidentiality but no integrity or availability impact. This vulnerability is not listed in CISA's Known Exploited Vulnerabilities catalog.

Vendor
Siemens
Product
CPC80 Central Processing/Communication
CVSS
MEDIUM 5.3
CISA KEV
Not listed in stored evidence
Original CVE published
2024-05-14
Original CVE updated
2024-06-11
Advisory published
2024-05-14
Advisory updated
2024-06-11

Who should care

Organizations operating Siemens SICAM CPC80 Central Processing/Communication systems with OPUPI0 AMQP/MQTT modules, particularly in electric power utility and industrial control environments where MQTT is used for telemetry and messaging.

Technical summary

The OPUPI0 AMQP/MQTT module in Siemens SICAM products stores MQTT client passwords with insufficient protection. Local or remote authenticated attackers with shell access can extract credentials. Fixed in OPUPI0 V5.30.

Defensive priority

medium

Recommended defensive actions

  • Apply Siemens firmware update OPUPI0 V5.30 or later, available within CP-8031/CP-8050 Package V5.30
  • Restrict remote shell access to authorized personnel only and monitor for unauthorized access attempts
  • Implement network segmentation to limit exposure of affected devices to untrusted networks
  • Review and rotate MQTT credentials if compromise is suspected
  • Follow CISA ICS recommended practices for defense-in-depth strategies
  • Monitor Siemens ProductCERT advisories for additional security updates

Evidence notes

Vulnerability description and remediation details sourced from CISA CSAF advisory ICSA-24-137-02. Vendor attribution and affected product identification confirmed through CSAF product tree data. CVSS vector and remediation instructions extracted from source advisory remediations section. Timeline dates per CVE record metadata.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-31486 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-31486

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2024-31486 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-31486

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2024/icsa-24-137-02.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/csaf/ssa-871704.json

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/html/ssa-871704.html

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/pdf/ssa-871704.pdf

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/txt/ssa-871704.txt

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-24-137-02

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/uscert/ics/alerts/ICS-ALERT-10-301-01

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/resources-tools/resources/ics-recommended-practices

    Reference

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.