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CVE-2023-40251

• Severity: medium (CVSS 5.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-08-17 · updated 2026-06-17
• Weakness: CWE-311

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.

Affected products

• Genians Genian Nac: from 4.0.0 before 4.0.156; from 5.0.0 before 5.0.55; 5.0.42, 5.0.42-revision_117460 — fixed in 4.0.156, 5.0.55
• Genians Genian ZTNA: from 6.0.0 before 6.0.16 — fixed in 6.0.16

How to fix

Upgrade to a fixed version: Genians Genian Nac 4.0.156, 5.0.55; Genians Genian ZTNA 6.0.16. Check the vendor advisory for mitigations.

References

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

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