CVE-2022-40265: Mitsubishielectric r04encpu Firmware

High severity, CVSS 7.5. EPSS: 1% chance of exploitation in the next 30 days.

Improper Input Validation vulnerability in Mitsubishi Electric Corporation MELSEC iQ-R Series RJ71EN71 Firmware version "65" and prior and Mitsubishi Electric Corporation MELSEC iQ-R Series R04/08/16/32/120ENCPU Network Part Firmware version "65" and prior allows a remote unauthenticated attacker to cause a Denial of Service condition by sending specially crafted packets. A system reset is required for recovery.

Affected products

• Mitsubishielectric r04encpu Firmware: up to and including 65
• Mitsubishielectric r08encpu Firmware: up to and including 65
• Mitsubishielectric r120encpu Firmware: up to and including 65
• Mitsubishielectric r16encpu Firmware: up to and including 65
• Mitsubishielectric r32encpu Firmware: up to and including 65
• Mitsubishielectric RJ71EN71 Firmware: up to and including 65

Published 2022-11-30. Last modified 2026-06-17.