How severe is CVE-2023-3670?

CVE-2023-3670 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-3670 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-3670?

CVE-2023-3670 primarily affects Codesys Development System. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-3670?

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-2023-3670 published?

CVE-2023-3670 was published on 2023-07-28 and last updated on 2026-06-17.

CVE-2023-3670

CVE-2023-3670 is a high-severity vulnerability in Codesys Development System with a CVSS 3.x base score of 7.3. 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-668.

Key facts

Severity: High (CVSS 3.x base score 7.3)
EPSS exploit prediction: 0% (10th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-668
Affected product: Codesys Development System
Published: 2023-07-28
Last modified: 2026-06-17

Description

In CODESYS Development System 3.5.9.0 to 3.5.17.0 and CODESYS Scripting 4.0.0.0 to 4.1.0.0 unsafe directory permissions would allow an attacker with local access to the workstation to place potentially harmful and disguised scripts that could be executed by legitimate users.

Frequently asked questions

What is CVE-2023-3670?: In CODESYS Development System 3.5.9.0 to 3.5.17.0 and CODESYS Scripting 4.0.0.0 to 4.1.0.0 unsafe directory permissions would allow an attacker with local access to the workstation to place potentially harmful and disguised scripts that could be executed by legitimate users.
How severe is CVE-2023-3670?: CVE-2023-3670 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-3670 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-3670?: CVE-2023-3670 primarily affects Codesys Development System. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-3670?: 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-2023-3670 published?: CVE-2023-3670 was published on 2023-07-28 and last updated on 2026-06-17.

References

https://cert.vde.com/en/advisories/VDE-2023-024

Affected products (2)

cpe:2.3:a:codesys:development_system:*:*:*:*:*:*:*:*
cpe:2.3:a:codesys:scripting:*:*:*:*:*:*:*:*

More vulnerabilities in Codesys Development System

CVE-2019-9010 — Critical (CVSS 9.8): An issue was discovered in 3S-Smart CODESYS V3 products. The CODESYS Gateway does not correctly verify the ownership of…
CVE-2023-3663 — High (CVSS 8.8): In CODESYS Development System versions from 3.5.11.20 and before 3.5.19.20 a missing integrity check might allow an…
CVE-2022-4224 — High (CVSS 8.8): In multiple products of CODESYS v3 in multiple versions a remote low privileged user could utilize this vulnerability…
CVE-2019-9013 — High (CVSS 8.8): An issue was discovered in 3S-Smart CODESYS V3 products. The application may utilize non-TLS based encryption, which…
CVE-2022-22515 — High (CVSS 8.1): A remote, authenticated attacker could utilize the control program of the CODESYS Control runtime system to use the…
CVE-2026-44469 — High (CVSS 7.8): The affected product extracts installation files to a temporary directory with incorrect default permissions during…

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