Vulnerability in Mitsubishielectric Fx3u-Enet

CVE-2021-20612

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.

EPSS: 0.036 (88.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

References

Frequently asked questions

What is CVE-2021-20612?
CVE-2021-20612 is a high-severity vulnerability in Mitsubishielectric Fx3u-Enet. CVSS score: 7.5/10. Published 2022-01-14.
How severe is CVE-2021-20612?
High severity. CVSS v3 base score is 7.5 out of 10.