Published: 14/01/2022 Updated: 21/01/2022

CVSS v2 Base Score: 7.8 | Impact Score: 6.9 | Exploitability Score: 10

CVSS v3 Base Score: 7.5 | Impact Score: 3.6 | Exploitability Score: 3.9

VMScore: 694

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

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 malicious user 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.

Vulnerable Product	Search on Vulmon	Subscribe to Product
mitsubishielectric fx3u-enet_firmware
mitsubishielectric fx3u-enet-l_firmware
mitsubishielectric fx3u-enet-p502_firmware

Critical Infrastructure Sectors: Critical Manufacturing

CWE-665 https://jvn.jp/vu/JVNVU93268332/index.html https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-024_en.pdf https://www.cisa.gov/uscert/ics/advisories/icsa-22-013-07 https://nvd.nist.gov https://www.cisa.gov/uscert/ics/advisories/icsa-22-013-07

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CVE-2021-20613

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