PatchSiren

PatchSiren cyber security CVE debrief

CVE-2024-4106 Yokogawa CVE debrief

CVE-2024-4106 is a medium-severity vulnerability affecting Yokogawa FAST/TOOLS and CI Server products, published on June 27, 2024. The vulnerability stems from built-in accounts with no passwords set by default, allowing attackers to gain unauthorized access if products are operated without password configuration. The CVSS 3.1 score of 5.3 reflects network-based attack vector with low attack complexity, no privileges required, and low confidentiality impact. Six product variants are affected across FAST/TOOLS packages (RVSVRN, UNSVRN, HMIWEB, FTEES, HMIMOB) versions R9.01 through R10.04, and CI Server versions R1.01.00 through R1.03.00. Yokogawa has provided specific patching guidance: FAST/TOOLS users should update to R10.04, apply patch R10.04 SP3, then apply patch I12560; CI Server users should update to R1.03.00 and apply patch R10.04 SP3. Critical immediate action is required for any deployments still using default account passwords—these must be changed per patch documentation. The vendor additionally recommends comprehensive security program implementation including ongoing patch management, anti-virus, backup/recovery, network zoning, system hardening, application whitelisting, and firewall deployment. Organizations may contact Yokogawa for security risk assessment services to develop effective mitigation strategies. This vulnerability is not currently listed in CISA's Known Exploited Vulnerabilities catalog.

Vendor
Yokogawa
Product
FAST/TOOLS RVSVRN Package
CVSS
MEDIUM 5.3
CISA KEV
Not listed in stored evidence
Original CVE published
2024-06-27
Original CVE updated
2024-06-27
Advisory published
2024-06-27
Advisory updated
2024-06-27

Who should care

Industrial control system operators using Yokogawa FAST/TOOLS or CI Server, particularly in critical infrastructure sectors. Security teams responsible for OT/ICS asset management and patch deployment. Organizations with legacy Yokogawa deployments that may have unconfigured default accounts. Compliance officers tracking CISA ICS advisories for regulatory reporting.

Technical summary

The vulnerability exists in Yokogawa's FAST/TOOLS SCADA platform and CI Server collaborative information server where built-in accounts ship with no passwords configured. When deployed with default settings, these accounts allow unauthenticated network access. The attack requires no privileges and has low complexity, though user interaction may be required in some CVSS 4.0 scoring contexts. Affected versions span multiple FAST/TOOLS component packages (RVSVRN, UNSVRN, HMIWEB, FTEES, HMIMOB) from R9.01 to R10.04, and CI Server R1.01.00 to R1.03.00. Remediation follows a staged patch approach with version upgrades and supplemental patches, plus mandatory password configuration for default accounts.

Defensive priority

high

Recommended defensive actions

  • Apply Yokogawa-provided patches: FAST/TOOLS users update to R10.04, apply R10.04 SP3, then I12560; CI Server users update to R1.03.00 and apply R10.04 SP3
  • Immediately change default account passwords on all affected products per patch documentation
  • Implement comprehensive security program including patch management, anti-virus, backups, network zoning, hardening, whitelisting, and firewalls
  • Contact Yokogawa for security risk assessment to develop tailored mitigation strategy
  • Monitor CISA ICS advisories for additional guidance

Evidence notes

Vulnerability details and remediation guidance sourced from CISA CSAF advisory ICSA-24-179-03. CVSS vector confirmed as CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N. Six affected products identified with specific version ranges. Vendor fix and mitigation steps explicitly documented in source remediations array.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-4106 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-4106

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

  • CVE-2024-4106 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-4106

    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-24-179-03.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-24-179-03

    Reference

  • Source reference

    Unverified legacy reference

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

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/publications/Cybersecurity_Best_Practices_for_Industrial_Control_Systems.pdf

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/topics/industrial-control-systems

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/uscert/sites/default/files/publications/emailscams0905.pdf

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/uscert/ncas/tips/ST04-014

    Reference

  • Source reference

    Unverified legacy reference

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

    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.