CVE-2021-20600: Mitsubishielectric r12ccpu-V Firmware

Medium severity, CVSS 5.9. EPSS: 2.4% chance of exploitation in the next 30 days.

Uncontrolled resource consumption in Mitsubishi Electric MELSEC iQ-R series C Controller Module R12CCPU-V Firmware Versions "16" and prior allows a remote unauthenticated attacker to cause a denial-of-service (DoS) condition by sending a large number of packets in a short time while the module starting up. System reset is required for recovery.

Affected products

• Mitsubishielectric r12ccpu-V Firmware: up to and including 16

Published 2021-10-08. Last modified 2026-06-17.