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PatchSiren cyber security CVE debrief

CVE-2025-11009 Mitsubishi Electric CVE debrief

Mitsubishi Electric GT Designer3 contains an information disclosure vulnerability (CWE-312) due to cleartext storage of sensitive credentials. The engineering software stores and verifies credentials in plain text within project files, allowing an attacker with access to these files to extract plaintext credentials. Successful credential extraction could enable unauthorized operation of connected GOT2000 series or GOT1000 series human-machine interface (HMI) devices. The vulnerability requires local access to project files and has high attack complexity, with no user interaction needed. The CVSS 3.1 score of 5.1 (Medium) reflects the confidentiality impact without integrity or availability effects.

Vendor
Mitsubishi Electric
Product
GT Designer3 Version1 (GOT2000)
CVSS
MEDIUM 5.1
CISA KEV
Not listed in stored evidence
Original CVE published
2025-12-16
Original CVE updated
2025-12-16
Advisory published
2025-12-16
Advisory updated
2025-12-16

Who should care

Industrial control system engineers, OT security teams, and manufacturing organizations using Mitsubishi Electric GOT series HMIs with GT Designer3 engineering software should prioritize assessment. Organizations with distributed engineering teams or project file sharing practices face elevated exposure. Asset owners in critical infrastructure sectors with regulatory requirements for credential protection should evaluate compliance implications.

Technical summary

GT Designer3 Version1 stores authentication credentials in plaintext within project files. The software performs credential verification without cryptographic protection, exposing usernames and passwords to any party with file system access to project files. This design flaw enables credential harvesting from backup archives, shared directories, or compromised workstations. Extracted credentials may authenticate to GOT2000 and GOT1000 series HMIs, potentially allowing unauthorized process manipulation. The vulnerability is classified as information disclosure with no direct integrity or availability impact on the engineering software itself, though downstream integrity impacts on connected control systems are possible through credential misuse.

Defensive priority

medium

Recommended defensive actions

  • Restrict GT Designer3 workstations to internal LAN segments and block remote login from untrusted networks, hosts, and users
  • When internet connectivity is required, deploy firewall rules and VPN access controls to prevent unauthorized remote access
  • Maintain current antivirus software on all engineering workstations running GT Designer3
  • Implement security awareness training to prevent opening of untrusted files or clicking untrusted links
  • Review Mitsubishi Electric's security advisory for additional vendor-specific guidance
  • Audit existing GT Designer3 project files for exposure risk and rotate any credentials that may have been stored in legacy project files
  • Apply network segmentation between engineering workstations and operational HMI networks to limit lateral movement potential

Evidence notes

CISA ICS advisory ICSA-25-350-04 published 2025-12-16 documents this vulnerability with vendor confirmation from Mitsubishi Electric. The advisory specifies affected products as GT Designer3 Version1 for both GOT2000 and GOT1000 series. CVSS vector AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N indicates local attack vector with high complexity but no privileges or user interaction required.

Sources and references

Verified primary and authoritative sources

  • CVE-2025-11009 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2025-11009

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

  • CVE-2025-11009 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2025-11009

    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/2025/icsa-25-350-04.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-25-350-04

    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

  • 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/news-events/ics-alerts/ics-alert-10-301-01

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf

    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.