Mitsubishi Electric MELSEC-Q Series PLCs

Summary

Vulnerabilities 1

• High 7.5
  CVE-2019-6535

  Mitsubishi Electric MELSEC-Q Series PLCs Resource Exhaustion

  Mitsubishi Electric Q03/04/06/13/26UDVCPU: serial number 20081 and prior, Q04/06/13/26UDPVCPU: serial number 20081 and prior, and Q03UDECPU, Q04/06/10/13/20/26/50/100UDEHCPU: serial number 20101 and prior. A remote attacker can send specific bytes over Port 5…

  Mitsubishi Electric Q03/04/06/13/26UDVCPU Q03UDECPU, Q04/06/10/13/20/26/50/100UDEHCPU Q04/06/13/26UDPVCPU ICS / OT
  Feb 5, 2019

Revision history

1. 2025-06-24 #3

   Update B - Updated vulnerability description to include USB as an affected communication vector

2. 2023-10-05 #2

   Update A - Updated vulnerability description

3. 2019-01-29 #1

   Initial Publication

References

• ICSA Advisory ICSA-19-029-02 - Web Version
  https://www.cisa.gov/news-events/ics-advisories/icsa-19-029-02
• Recommended Practices
  https://www.cisa.gov/uscert/ics/alerts/ICS-ALERT-10-301-01
• Recommended Practices
  https://www.cisa.gov/resources-tools/resources/ics-recommended-practices
• Recommended Practices
  https://www.cisa.gov/sites/default/files/publications/Cybersecurity_Best_Practices_for_Industrial_Control_Systems.pdf
• Recommended Practices
  https://www.cisa.gov/topics/industrial-control-systems
• Recommended Practices
  https://www.cisa.gov/uscert/sites/default/files/publications/emailscams0905.pdf
• Recommended Practices
  https://www.cisa.gov/uscert/ncas/tips/ST04-014
• Recommended Practices
  https://us-cert.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
• Recommended Practices
  https://www.cisa.gov/uscert/ics/tips/ICS-TIP-12-146-01B