CVE-2020-5545: Mitsubishielectric IU1-1m20-D Firmware

Critical severity, CVSS 9.8. EPSS: 2.3% chance of exploitation in the next 30 days.

TCP function included in the firmware of Mitsubishi Electric MELQIC IU1 series IU1-1M20-D firmware version 1.0.7 and earlier allows remote attackers to bypass access restriction and to stop the network functions or execute malware via a specially crafted packet.

Affected products

• Mitsubishielectric IU1-1m20-D Firmware: up to and including 1.0.7

Published 2020-03-16. Last modified 2026-06-17.