CVE:CVE-2021-20591
CNNVD:CNNVD-202105-1775
Mitsubishi Electric MELSEC iQ-R series是日本三菱电机（Mitsubishi Electric）公司的一款可编程逻辑控制器。
Mitsubishi Electric MELSEC iQ-R Series 的 CPU 单元的 MELSOFT 通信端口 (TCP/IP) 中存在资源管理错误漏洞，该漏洞源于远程第三方保持连接到 MELSOFT 通信端口 (TCP/IP)，MELSOFT 通信端口 (TCP/IP) 的资源将被耗尽。攻击者可通过该漏洞引发DOS攻击。
solution:Upgrade mitsubishielectric r00cpu_firmware to a higher version than *; Upgrade mitsubishielectric r01cpu_firmware to a higher version than *; Upgrade mitsubishielectric r02cpu_firmware to a higher version than *; Upgrade mitsubishielectric r04cpu_firmware to a higher version than *; Upgrade mitsubishielectric r08cpu_firmware to a higher version than *; Upgrade mitsubishielectric r16cpu_firmware to a higher version than *; Upgrade mitsubishielectric r32cpu_firmware to a higher version than *; Upgrade mitsubishielectric r120cpu_firmware to a higher version than *; Upgrade mitsubishielectric r08sfcpu_firmware to a higher version than *; Upgrade mitsubishielectric r16sfcpu_firmware to a higher version than *; Upgrade mitsubishielectric r32sfcpu_firmware to a higher version than *; Upgrade mitsubishielectric r120sfcpu_firmware to a higher version than *; Upgrade mitsubishielectric r08pcpu_firmware to a higher version than *; Upgrade mitsubishielectric r16pcpu_firmware to a higher version than *; Upgrade mitsubishielectric r32pcpu_firmware to a higher version than *; Upgrade mitsubishielectric r120pcpu_firmware to a higher version than *; Upgrade mitsubishielectric r08psfcpu_firmware to a higher version than *; Upgrade mitsubishielectric r16psfcpu_firmware to a higher version than *; Upgrade mitsubishielectric r32psfcpu_firmware to a higher version than *; Upgrade mitsubishielectric r120psfcpu_firmware to a higher version than *