What is CVE-2023-4562?

CVE-2023-4562 is a critical-severity vulnerability in Mitsubishielectric Fx3g-14 Mr\/ds, classified under Improper Authentication. CVSS score: 9.1/10. Published 2023-10-13.

How severe is CVE-2023-4562?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Auth bypass in Mitsubishielectric Fx3g-14 Mr\/ds

CVE-2023-4562

Improper Authentication vulnerability in Mitsubishi Electric Corporation MELSEC-F Series main modules allows a remote unauthenticated attacker to obtain sequence programs from the product or write malicious sequence programs or improper data in the product without authentication by sending illegitimate messages.

Vulnerability class: Broken Authentication

Published 2023-10-13 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.009 (56.5th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 56.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2023-012_en.pdf (vendor-advisory, Vendor Advisory)
jvn.jp/vu/JVNVU90509290/ (Third Party Advisory, government-resource)
www.cisa.gov/news-events/ics-advisories/icsa-23-285-13 (US Government Resource, Third Party Advisory, government-resource)

Frequently asked questions

What is CVE-2023-4562?: CVE-2023-4562 is a critical-severity vulnerability in Mitsubishielectric Fx3g-14 Mr\/ds, classified under Improper Authentication. CVSS score: 9.1/10. Published 2023-10-13.
How severe is CVE-2023-4562?: Critical severity. CVSS v3 base score is 9.1 out of 10.