What’s Vulnerable › Vulnerabilities

CVE-2023-28399

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-06-01 · updated 2026-06-17
• Weakness: CWE-732

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.

Affected products

• Contec Co., Ltd. CONPROSYS HMI System (CHS): before 3.5.3 — fixed in 3.5.3

How to fix

Upgrade to a fixed version: Contec Co., Ltd. CONPROSYS HMI System (CHS) 3.5.3. Check the vendor advisory for mitigations.

References

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

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