Mitsubishi (CVE-2021-20612)

high Tenable OT Security Plugin ID 501188

Synopsis

The remote OT asset is affected by a vulnerability.

Description

Lack of administrator control over security vulnerability in MELSEC-F series FX3U-ENET Firmware version 1.14 and prior, FX3U-ENET-L Firmware version 1.14 and prior and FX3U-ENET-P502 Firmware version 1.14 and prior allows a remote unauthenticated attacker to cause a denial-of- service (DoS) condition in communication function of the product or other unspecified effects by sending specially crafted packets to an unnecessary opening of TCP port. Control by MELSEC-F series PLC is not affected by this vulnerability, but system reset is required for recovery.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.

Solution

Refer to the vendor advisory.

Plugin Details

Severity: High

ID: 501188

File Name: tenable_ot_mitsubishi_CVE-2021-20612.nasl

Version: 1.8

Type: Remote

Family: Tenable.ot

Published: 6/12/2023

Updated: 6/19/2026

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: High

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2021-20612

CVSS v3

Risk Factor: High

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Vulnerability Information

CPE: cpe:/o:mitsubishielectric:fx3u-enet-l_firmware, cpe:/o:mitsubishielectric:fx3u-enet_firmware, cpe:/o:mitsubishielectric:fx3u-enet-p502_firmware

Required KB Items: Tenable.ot/Mitsubishi

Exploit Ease: No known exploits are available

Patch Publication Date: 1/14/2022

Vulnerability Publication Date: 1/14/2022

Reference Information

CVE: CVE-2021-20612

ICSA: 22-013-01

Detections

Analytics