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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.036 (89.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 89.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.036 · newest: 0.036 · change: 0.000
Affected products
- Mitsubishielectric Fx3u-Enet
- Mitsubishielectric Fx3u-Enet Firmware
- Mitsubishielectric Fx3u-Enet-L
- Mitsubishielectric Fx3u-Enet-L Firmware
- Mitsubishielectric Fx3u-Enet-P502
- Mitsubishielectric Fx3u-Enet-P502 Firmware
- Melsec-F Series Fx3u-Enet; Fx3u-Enet-L; Fx3u-Enet-P502 — versions Firmware version 1.14 and prior
References
- www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-023_en.pdf (Vendor Advisory)
- jvn.jp/vu/JVNVU93268332/index.html (VDB Entry, Third Party Advisory)
- www.cisa.gov/uscert/ics/advisories/icsa-22-013-01 (US Government Resource, Third Party Advisory)
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.