What is CVE-2023-6943?

CVE-2023-6943 is a critical-severity vulnerability in Mitsubishielectric Ezsocket, classified under Use of Externally-Controlled Input to Select Classes or Code (Unsafe Reflection). CVSS score: 9.8/10. Published 2024-01-30.

How severe is CVE-2023-6943?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2023-6943 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Mitsubishielectric Ezsocket

CVE-2023-6943

Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') vulnerability in Mitsubishi Electric Corporation EZSocket versions 3.0 to 5.92, GT Designer3 Version1(GOT1000) versions 1.325P and prior, GT Designer3 Version1(GOT2000) versions 1.320J and prior, GX Works2 versions 1.11M to 1.626C, GX Works3 versions 1.106L and prior, MELSOFT Navigator versions 1.04E to 2.102G, MT Works2 versions 1.190Y and prior, MX Component versions 4.00A to 5.007H and MX OPC Server DA/UA all versions allows a remote unauthenticated attacker to execute a malicious code by RPC with a path to a malicious library while connected to the products.

Published 2024-01-30 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.021 (81.7th percentile), scored 2026-10-20.

Low probability of exploitation in the next 30 days, but still tracked. 82nd percentile — 81.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.021 · newest: 0.021 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-470 — Use of Externally-Controlled Input to Select Classes or Code (Unsafe Reflection)

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2023-020_en.pdf (vendor-advisory, Vendor Advisory)
jvn.jp/vu/JVNVU95103362 (Third Party Advisory, government-resource)
www.cisa.gov/news-events/ics-advisories/icsa-24-030-02 (US Government Resource, Third Party Advisory, government-resource)

Frequently asked questions

What is CVE-2023-6943?: CVE-2023-6943 is a critical-severity vulnerability in Mitsubishielectric Ezsocket, classified under Use of Externally-Controlled Input to Select Classes or Code (Unsafe Reflection). CVSS score: 9.8/10. Published 2024-01-30.
How severe is CVE-2023-6943?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2023-6943 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.