How severe is CVE-2023-28399?

CVE-2023-28399 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-28399 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-28399?

CVE-2023-28399 affects Contec Conprosys Hmi System. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-28399?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2023-28399 published?

CVE-2023-28399 was published on 2023-06-01 and last updated on 2026-06-17.

CVE-2023-28399

CVE-2023-28399 is a high-severity vulnerability in Contec Conprosys Hmi System with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-732.

Key facts

Severity: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 0% (8th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-732
Affected product: Contec Conprosys Hmi System
Published: 2023-06-01
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2023-28399?: 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.
How severe is CVE-2023-28399?: CVE-2023-28399 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-28399 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-28399?: CVE-2023-28399 affects Contec Conprosys Hmi System. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-28399?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-28399 published?: CVE-2023-28399 was published on 2023-06-01 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:contec:conprosys_hmi_system:*:*:*:*:*:*:*:*

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