CVE-2021-20613

Name of the Vulnerable Software and Affected Versions MELSEC-F series FX3U-ENET Firmware versions prior to 1.17 MELSEC-F series FX3U-ENET-L Firmware versions prior to 1.17 MELSEC-F series FX3U-ENET-P502 Firmware versions prior to 1.17

Description The issue allows a remote unauthenticated attacker to cause a denial-of-service (DoS) condition in the communication function of the product by sending specially crafted packets. Control by MELSEC-F series PLC is not affected, but a system reset is required for recovery.

Recommendations For MELSEC-F series FX3U-ENET Firmware versions prior to 1.17, update to version 1.17 or later. For MELSEC-F series FX3U-ENET-L Firmware versions prior to 1.17, update to version 1.17 or later. For MELSEC-F series FX3U-ENET-P502 Firmware versions prior to 1.17, update to version 1.17 or later.