CVE-2021-20613

HIGH

MELSEC-F series FX3U-ENET Firmware < 1.16 - Unauthenticated Denial of Service via Crafted Packets

Title source: llm
STIX 2.1

Description

Improper initialization vulnerability in MELSEC-F series FX3U-ENET Firmware version 1.16 and prior, FX3U-ENET-L Firmware version 1.16 and prior and FX3U-ENET-P502 Firmware version 1.16 and prior allows a remote unauthenticated attacker to cause a denial-of-service (DoS) condition in communication function of the product by sending specially crafted packets. Control by MELSEC-F series PLC is not affected by this vulnerability, but system reset is required for recovery.

References (3)

Core 3
Core References
Third Party Advisory, VDB Entry x_refsource_misc
https://jvn.jp/vu/JVNVU93268332/index.html
Third Party Advisory, US Government Resource x_refsource_misc
https://www.cisa.gov/uscert/ics/advisories/icsa-22-013-07

Scores

CVSS v3 7.5
EPSS 0.0360
EPSS Percentile 87.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-665
Status published
Products (3)
mitsubishielectric/fx3u-enet-l_firmware < 1.16
mitsubishielectric/fx3u-enet-p502_firmware < 1.16
mitsubishielectric/fx3u-enet_firmware < 1.16
Published Jan 14, 2022
Tracked Since Feb 18, 2026