CVE-2023-28399

Name: CVE-2023-28399
Creator: NVD / NIST
Published: 2023-06-01T02:15:09.497+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.18%

Last modified Jun 17, 2026

CVE-2023-28399 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. Incorrect permission assignment for critical resource exists in CONPROSYS HMI System (CHS) versions prior to 3.5.3. ACL (Access Control List) is not appropriately set to the local folder where the affected product is installed, therefore a wide range of privileges is permitted to a user of the PC where the affected product is installed. EPSS estimates a 0.18% chance of exploitation in the next 30 days.

Description

Incorrect permission assignment for critical resource exists in CONPROSYS HMI System (CHS) versions prior to 3.5.3. ACL (Access Control List) is not appropriately set to the local folder where the affected product is installed, therefore a wide range of privileges is permitted to a user of the PC where the affected product is installed. As a result, the user may be able to destroy the system and/or execute a malicious program.

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

0.18%

8.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Contec	Conprosys Hmi System	< 3.5.3

References

https://jvn.jp/en/vu/JVNVU93372935/Third Party Advisory
https://www.contec.com/api/downloadlogger?download=/-/media/Contec/jp/support/security-info/contec_security_chs_230531_en.pdfVendor Advisory
https://www.contec.com/jp/api/downloadlogger?download=/-/media/Contec/jp/support/security-info/contec_security_chs_230531_jp.pdfVendor Advisory
https://jvn.jp/en/vu/JVNVU93372935/Third Party Advisory
https://www.contec.com/api/downloadlogger?download=/-/media/Contec/jp/support/security-info/contec_security_chs_230531_en.pdfVendor Advisory
https://www.contec.com/jp/api/downloadlogger?download=/-/media/Contec/jp/support/security-info/contec_security_chs_230531_jp.pdfVendor Advisory

Timeline

Published: Jun 1, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-28399?

How severe is CVE-2023-28399?

CVE-2023-28399 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.18% probability of exploitation in the next 30 days.

How do I fix CVE-2023-28399?

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-2023-28399?

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

Scan your code now

Source: NVD / NIST