Back to Database
Status published
High
CVE-2020-5665
Improper check or handling of exceptional conditions in MELSEC iQ-F...
Vulnerability Description
Improper check or handling of exceptional conditions in MELSEC iQ-F series FX5U(C) CPU unit firmware version 1.060 and earlier allows an attacker to cause a denial-of-service (DoS) condition on program execution and communication by sending a specially crafted ARP packet.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
THREAT MONITOR
Am I Vulnerable?
Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2020-5665
Credits & Attribution
No credits recorded in the NVD database.
References
More from Mitsubishi Electric Corporation
View All →CVE-2025-8531
Improper Handling of Length Parameter Inconsistency vulnerability in Mitsubishi Electric...
Medium
6.8
CVE-2025-7731
Information Disclosure Vulnerability in MELSEC iQ-F Series CPU module
High
7.5
CVE-2025-7405
Information Disclosure, Information Tampering, and Denial of Service (DoS) Vulnerability in MELSEC iQ-F Series CPU module
High
7.3
CVE-2025-7376
Information Tampering Vulnerability in Multiple Processes of GENESIS64, ICONICS Suite, MobileHMI, Hyper Historian, AnalytiX, IoTWorX, MC Works64, and GENESIS
Medium
5.9
CVE-2025-5514
Denial-of-Service(DoS) Vulnerability in Web server function on MELSEC iQ-F Series CPU module
Medium
5.3
Affected Vendor
Mitsubishi Electric Corporation
View all reports →Affected Software
MELSEC iQ-F series FX5U(C) CPU unit
Vulnerable Versions:
firmware version 1.060 and earlier
Timeline
Official Publish:
December 14th, 2020
Last Modified:
August 4th, 2024
Added to House:
July 21st, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Weaknesses (CWE)
No CWE data available
MITRE ATT&CK TTPs
No associated TTPs found for this vulnerability.