What is CVE-2023-22339?

CVE-2023-22339 is a high-severity vulnerability in Contec Conprosys Hmi System, classified under Improper Access Control. CVSS score: 7.5/10. Published 2023-01-20.

How severe is CVE-2023-22339?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Contec Conprosys Hmi System

CVE-2023-22339

Improper access control vulnerability in CONPROSYS HMI System (CHS) Ver.3.4.5 and earlier allows a remote unauthenticated attacker to bypass access restriction and obtain the server certificate including the private key of the product.

Published 2023-01-20 · last modified 2026-06-17.

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:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.011 (66.1th percentile), scored 2026-10-21.

Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 66.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Contec Conprosys Hmi System
Contec Co., Ltd. Conprosys Hmi System (Chs) — versions Ver.3.4.5 and earlier

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

www.contec.com/download/contract/contract4/ (Patch, Vendor Advisory)
www.contec.com/api/downloadlogger (Patch, Vendor Advisory)
jvn.jp/en/vu/JVNVU96873821 (Patch, Third Party Advisory)
www.cisa.gov/uscert/ics/advisories/icsa-22-347-03 (US Government Resource, Third Party Advisory)

Frequently asked questions

What is CVE-2023-22339?: CVE-2023-22339 is a high-severity vulnerability in Contec Conprosys Hmi System, classified under Improper Access Control. CVSS score: 7.5/10. Published 2023-01-20.
How severe is CVE-2023-22339?: High severity. CVSS v3 base score is 7.5 out of 10.