CVE-2023-22339

highpriority · track · 30EPSS 0.011 · 66 %ileEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

1.14% (66th) EPSS

CVSS 7.5 · high

Is it mine?

6 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cisa_csaf_ot · nvd

EPSS · scored 2026-10-27

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.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedCONPROSYS HMI System (CHS)cisa_csaf_ot
Contec recommends users update to CONPROSYS HMI System (CHS) Ver.3.5.0 or later.
https://www.contec.com/software-update/?year=d90a89d4-f21e-4fc2-bab0-291bb3d23495

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.9–7.5

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.07.5highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondary · CISA US

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondary · ENISA EU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondaryexploitability 3.9 · impact 3.6

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-284USCWE-284US

affected products (6)

Products and version ranges known to be affected.

CONPROSYS HMI System (CHS): Ver.3.4.4 and priorall versionscisa_csaf_otUS
CONPROSYS HMI System (CHS): Ver.3.4.5 and priorall versionscisa_csaf_otUS
Contec CONPROSYS HMI System (CHS)≤ 3.4.4cisa_csaf_otUS
Contec CONPROSYS HMI System (CHS)≤ 3.4.5cisa_csaf_otUS
Contec Co., Ltd. CONPROSYS HMI System (CHS)≤ Ver.3.4.5 and earlierenisa_euvdEU
contec conprosys hmi system≤ 3.4.5nvdUScpe:2.3:a:contec:conprosys_hmi_system:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

ICSA-22-347-03Contec CONPROSYS HMI System (CHS)2022-12-13icsa · cisa_csaf_otUS
Successful exploitation of these vulnerabilities could allow a remote attacker to send specially crafted requests and cause a loss of sensitive information.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cisa_csaf_ot nvd NVD CVE.org MITRE

published 2023-01-20modified 2026-06-17

references (14)

External citations — patches, advisories, analysis.

scry

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