How severe is CVE-2023-40251?

CVE-2023-40251 has a CVSS 3.x base score of 5.2, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2023-40251 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-40251?

CVE-2023-40251 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-2023-40251?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2023-40251 published?

CVE-2023-40251 was published on 2023-08-17 and last updated on 2026-06-17.

CVE-2023-40251

CVE-2023-40251 is a medium-severity vulnerability in Genians Genian Nac with a CVSS 3.x base score of 5.2. 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-311.

Key facts

Severity: Medium (CVSS 3.x base score 5.2)
EPSS exploit prediction: 0% (4th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-311
Affected product: Genians Genian Nac
Published: 2023-08-17
Last modified: 2026-06-17

Description

Missing Encryption of Sensitive Data vulnerability in Genians Genian NAC V4.0, Genians Genian NAC V5.0, Genians Genian NAC Suite V5.0, Genians Genian ZTNA allows Man in the Middle Attack.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-2023-40251?: Missing Encryption of Sensitive Data vulnerability in Genians Genian NAC V4.0, Genians Genian NAC V5.0, Genians Genian NAC Suite V5.0, Genians Genian ZTNA allows Man in the Middle Attack.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-2023-40251?: CVE-2023-40251 has a CVSS 3.x base score of 5.2, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2023-40251 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-40251?: CVE-2023-40251 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-2023-40251?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-40251 published?: CVE-2023-40251 was published on 2023-08-17 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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