How severe is CVE-2023-3939?

CVE-2023-3939 has a CVSS 3.x base score of 10.0, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-3939 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2023-3939?

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

Does CVE-2023-3939 have an EU (EUVD) identifier?

Yes. CVE-2023-3939 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-44565.

When was CVE-2023-3939 published?

CVE-2023-3939 was published on 2024-05-21 and last updated on 2026-06-17.

CVE-2023-3939

CVE-2023-3939 is a critical-severity vulnerability with a CVSS 3.x base score of 10.0. 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-78.

Key facts

Severity: Critical (CVSS 3.x base score 10.0)
EPSS exploit prediction: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-44565
Weakness: CWE-78
Published: 2024-05-21
Last modified: 2026-06-17

Description

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability in ZkTeco-based OEM devices allows OS Command Injection. Since all the found command implementations are executed from the superuser, their impact is the maximum possible. This issue affects ZkTeco-based OEM devices (ZkTeco ProFace X, Smartec ST-FR043, Smartec ST-FR041ME and possibly others) with the ZAM170-NF-1.8.25-7354-Ver1.0.0 and possibly other.

Frequently asked questions

What is CVE-2023-3939?: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability in ZkTeco-based OEM devices allows OS Command Injection. Since all the found command implementations are executed from the superuser, their impact is the maximum possible. This issue affects ZkTeco-based OEM devices (ZkTeco ProFace X, Smartec ST-FR043, Smartec ST-FR041ME and possibly others) with the ZAM170-NF-1.8.25-7354-Ver1.0.0 and possibly other.
How severe is CVE-2023-3939?: CVE-2023-3939 has a CVSS 3.x base score of 10.0, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-3939 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2023-3939?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2023-3939 have an EU (EUVD) identifier?: Yes. CVE-2023-3939 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-44565.
When was CVE-2023-3939 published?: CVE-2023-3939 was published on 2024-05-21 and last updated on 2026-06-17.

References

https://github.com/klsecservices/Advisories/blob/master/K-ZkTeco-2023-002.md

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