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CVE-2023-28399

HIGH
7.8
CVSS Score
Published: June 1, 2023 at 12:00 AM UTC
Updated: June 17, 2026 at 05:47 AM UTC
1 product affected across 1 vendorCONPROSYS HMI System

Using CONPROSYS HMI System (CHS) by Contec Co., Ltd.?

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Severity
HIGH7.8
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

CONPROSYS HMI System· Contec
95%
v < 3.5.3
Affected range stops below 3.5.3, so it looks safe — our inference, not a vendor statement

References (3)

Third Party Advisory
Source: [email protected]
https://jvn.jp/en/vu/JVNVU93372935/
Vendor Advisory
Source: [email protected]
https://www.contec.com/api/downloadlogger?download=/-/media/Contec/jp/support/security-info/contec_security_chs_230531_en.pdf
Vendor Advisory
Source: [email protected]
https://www.contec.com/jp/api/downloadlogger?download=/-/media/Contec/jp/support/security-info/contec_security_chs_230531_jp.pdf

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGHCISA-ADP
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-732

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