How severe is CVE-2023-22339?

CVE-2023-22339 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2023-22339 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-22339?

CVE-2023-22339 affects Contec Conprosys Hmi System. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-22339?

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-2023-22339 published?

CVE-2023-22339 was published on 2023-01-20 and last updated on 2026-06-17.

CVE-2023-22339

CVE-2023-22339 is a high-severity vulnerability in Contec Conprosys Hmi System with a CVSS 3.x base score of 7.5. 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-284.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (63rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-284
Affected product: Contec Conprosys Hmi System
Published: 2023-01-20
Last modified: 2026-06-17

Description

Improper access control vulnerability in CONPROSYS HMI System (CHS) Ver.3.4.5 and earlier allows a remote unauthenticated attacker to bypass access restriction and obtain the server certificate including the private key of the product.

Frequently asked questions

What is CVE-2023-22339?: Improper access control vulnerability in CONPROSYS HMI System (CHS) Ver.3.4.5 and earlier allows a remote unauthenticated attacker to bypass access restriction and obtain the server certificate including the private key of the product.
How severe is CVE-2023-22339?: CVE-2023-22339 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2023-22339 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-22339?: CVE-2023-22339 affects Contec Conprosys Hmi System. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-22339?: 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-2023-22339 published?: CVE-2023-22339 was published on 2023-01-20 and last updated on 2026-06-17.

References

Affected products (1)

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

More vulnerabilities in Contec Conprosys Hmi System

CVE-2022-44456 — Critical (CVSS 9.8): CONPROSYS HMI System (CHS) Ver.3.4.4?and earlier allows a remote unauthenticated attacker to execute an arbitrary OS…
CVE-2023-28657 — High (CVSS 8.8): Improper access control vulnerability exists in CONPROSYS HMI System (CHS) versions prior to 3.5.3. A user of the PC…
CVE-2023-28713 — High (CVSS 8.1): Plaintext storage of a password exists in CONPROSYS HMI System (CHS) versions prior to 3.5.3. Because account…
CVE-2023-28399 — High (CVSS 7.8): Incorrect permission assignment for critical resource exists in CONPROSYS HMI System (CHS) versions prior to 3.5.3. ACL…
CVE-2025-34081 — High (CVSS 7.5): The Contec Co.,Ltd. CONPROSYS HMI System (CHS) exposes a PHP phpinfo() debug page to unauthenticated users that may…
CVE-2023-22331 — High (CVSS 7.5): Use of default credentials vulnerability in CONPROSYS HMI System (CHS) Ver.3.4.5 and earlier allows a remote…

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