CVE-2023-22339

Name: CVE-2023-22339
Creator: NVD / NIST
Published: 2023-01-20T03:15:10.77+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.14%

Last modified Jun 17, 2026

CVE-2023-22339 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 1.14% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

1.14%

62.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-284

Affected Software

Vendor	Product	Versions
Contec	Conprosys Hmi System	<= 3.4.5

References

https://jvn.jp/en/vu/JVNVU96873821Patch, Third Party Advisory
https://www.cisa.gov/uscert/ics/advisories/icsa-22-347-03Third Party Advisory, US Government Resource
https://www.contec.com/api/downloadlogger?download=/-/media/Contec/jp/support/security-info/contec_security_chs_230110_en.pdfPatch, Vendor Advisory
https://www.contec.com/download/contract/contract4/?itemid=ea8039aa-3434-4999-9ab6-897aa690210c&downloaditemid=866d7d3c-aae9-438d-87f3-17aa040df90bPatch, Vendor Advisory
https://jvn.jp/en/vu/JVNVU96873821Patch, Third Party Advisory
https://www.cisa.gov/uscert/ics/advisories/icsa-22-347-03Third Party Advisory, US Government Resource
https://www.contec.com/api/downloadlogger?download=/-/media/Contec/jp/support/security-info/contec_security_chs_230110_en.pdfPatch, Vendor Advisory
https://www.contec.com/download/contract/contract4/?itemid=ea8039aa-3434-4999-9ab6-897aa690210c&downloaditemid=866d7d3c-aae9-438d-87f3-17aa040df90bPatch, Vendor Advisory

Timeline

Published: Jan 20, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-22339?

How severe is CVE-2023-22339?

CVE-2023-22339 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.14% probability of exploitation in the next 30 days.

How do I fix CVE-2023-22339?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-22339?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST