How severe is CVE-2023-40254?

CVE-2023-40254 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over local access with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-40254 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-40254?

CVE-2023-40254 primarily affects Genians Genian Nac. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-40254?

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-2023-40254 published?

CVE-2023-40254 was published on 2023-08-11 and last updated on 2026-06-17.

CVE-2023-40254

CVE-2023-40254 is a high-severity vulnerability in Genians Genian Nac 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-494.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (7th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-494
Affected product: Genians Genian Nac
Published: 2023-08-11
Last modified: 2026-06-17

Description

Download of Code Without Integrity Check vulnerability in Genians Genian NAC V4.0, Genians Genian NAC V5.0, Genians Genian NAC Suite V5.0, Genians Genian ZTNA allows Malicious Software Update.This issue affects Genian NAC V4.0: from V4.0.0 through V4.0.155; Genian NAC V5.0: from V5.0.0 through V5.0.42 (Revision 117460); Genian NAC Suite V5.0: from V5.0.0 through V5.0.54; Genian ZTNA: from V6.0.0 through V6.0.15.

Frequently asked questions

What is CVE-2023-40254?: Download of Code Without Integrity Check vulnerability in Genians Genian NAC V4.0, Genians Genian NAC V5.0, Genians Genian NAC Suite V5.0, Genians Genian ZTNA allows Malicious Software Update.This issue affects Genian NAC V4.0: from V4.0.0 through V4.0.155; Genian NAC V5.0: from V5.0.0 through V5.0.42 (Revision 117460); Genian NAC Suite V5.0: from V5.0.0 through V5.0.54; Genian ZTNA: from V6.0.0 through V6.0.15.
How severe is CVE-2023-40254?: CVE-2023-40254 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over local access with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-40254 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-40254?: CVE-2023-40254 primarily affects Genians Genian Nac. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-40254?: 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-2023-40254 published?: CVE-2023-40254 was published on 2023-08-11 and last updated on 2026-06-17.

References

https://docs.genians.com/nac/5.0/release/ko/advisories/GN-SA-2023-001.html

Affected products (4)

cpe:2.3:a:genians:genian_nac:*:*:*:*:-:*:*:*
cpe:2.3:a:genians:genian_nac:5.0.42:-:*:*:lts:*:*:*
cpe:2.3:a:genians:genian_nac:5.0.42:revision_117460:*:*:lts:*:*:*
cpe:2.3:a:genians:genian_ztna:*:*:*:*:*:*:*:*

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