CVE-2023-28399

Local code execution via unrestricted installation folder

Published Jun 1, 2023 · Updated Jan 9, 2025

Incorrect folder permissions in CONTEC CONPROSYS HMI System before 3.5.3 allow local users to execute programs or destroy the system. The local installation folder has no specific ACL, granting general OS users broad permissions over product files. A logged-in general user can alter those files, enabling malicious code to run in the product environment and allowing system destruction without administrative access.

CVSS severity7.8
High
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect folder permissions in CONTEC CONPROSYS HMI System before 3.5.3 allow local users to execute programs or destroy the system. The local installation folder has no specific ACL, granting general OS users broad permissions over product files. A logged-in general user can alter those files, enabling malicious code to run in the product environment and allowing system destruction without administrative access.

The record

CVE
CVE-2023-28399
Published
Jun 1, 2023
Updated
Jan 9, 2025
Vendor
CONTEC Co., Ltd.
Product
CONPROSYS HMI System (CHS)
Classifications
CWE-732
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 1, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 9, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=versions prior to 3.5.3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

CONTEC Co., Ltd. · CONPROSYS HMI System (CHS)version=versions prior to 3.5.3

Published CVSS scores

7.8CONTEC Co., Ltd.CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-732Incorrect Permission Assignment for Critical Resource

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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